diff --git a/app/app.iml b/app/app.iml
index 7cef00a..1a585d7 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -120,7 +120,7 @@
       <excludeFolder url="file://$MODULE_DIR$/build/reports" />
       <excludeFolder url="file://$MODULE_DIR$/build/tmp" />
     </content>
-    <orderEntry type="jdk" jdkName="Android API 23 Platform (1)" jdkType="Android SDK" />
+    <orderEntry type="jdk" jdkName="Android API 26 Platform (1)" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Gradle: com.google.android.gms:play-services-basement-15.0.1" level="project" />
     <orderEntry type="library" name="Gradle: __local_aars__:/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/libs/simple-xml-2.7.1.jar:unspecified@jar" level="project" />
diff --git a/app/build.gradle b/app/build.gradle
index 43c696a..55afa02 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,14 +3,14 @@ apply plugin: 'com.android.application'
 android {
     signingConfigs {
     }
-    compileSdkVersion 23
+    compileSdkVersion 26
     buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId 'de.frajul.endlessroll'
         minSdkVersion 14
-        targetSdkVersion 23
-        versionCode 6
-        versionName '0.6.0'
+        targetSdkVersion 26
+        versionCode 7
+        versionName '0.7.0'
     }
     buildTypes {
         release {
diff --git a/app/build/intermediates/incremental/mergeDebugResources/merger.xml b/app/build/intermediates/incremental/mergeDebugResources/merger.xml
index 5620850..b0f8146 100644
--- a/app/build/intermediates/incremental/mergeDebugResources/merger.xml
+++ b/app/build/intermediates/incremental/mergeDebugResources/merger.xml
@@ -1395,7 +1395,7 @@
         <item>Grasslands</item>
         <item>Icy Mountains</item>
         <item>Testcave</item>
-    </string-array></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/attr.xml" qualifiers=""/><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/colors.xml" qualifiers=""><color name="primary">#17b3f5</color><color name="primary_dark">#1791f5</color><color name="secondary">#ffb637</color><color name="secondary_light">#ffeb37</color><color name="secondary_dark">#ff8e37</color><color name="secondary_little_transparent">#e2ffb637</color><color name="secondary_much_transparent">#57ffb637</color><color name="red">#ff0000</color><color name="black">#000000</color><color name="transparent">#00000000</color><color name="message_buttons">#daf10d</color><color name="settings_button_disabled">#c7b7b7b7</color><color name="toolslotDisabled">#715f5f</color><color name="toolslotDisabledSelected">#60715f</color><color name="toolslotEnabled">#db41e42b</color><color name="toolslotEnabledSelected">#b3d700</color><color name="background_message">#9d000000</color><color name="background_short_menu">#5b000000</color><color name="background_tutorial">#3d000000</color></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/dimen.xml" qualifiers=""><dimen name="credits_margin_between_categories">50dp</dimen><dimen name="tool_inspector_width">170dp</dimen><dimen name="shape_inspector_width">170dp</dimen><dimen name="tool_button_width">70dp</dimen><dimen name="tool_button_height">60dp</dimen></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/strings.xml" qualifiers=""><string name="app_name" translatable="false">Endless Roll</string><string name="placeholder_button">Click me!</string><string name="placeholder_textview">I\'m a text!</string><string name="placeholder_number" translatable="false">997.5</string><string name="settings_show_fps">Show Fps</string><string name="game_bomb_error_message">Set the bomb on an obstacle</string><string name="game_playerprogress_placeholder" translatable="false">0.0m</string><string name="game_playerprogress_format_f" translatable="false">%.1fm</string><string name="game_playerspeed_placeholder" translatable="false">0.0m/s</string><string name="game_playerspeed_format_f" translatable="false">%.1fm/s</string><string name="game_fps_placeholder" translatable="false">Fps: 00</string><string name="game_fps_format_d" translatable="false">Fps: %d</string><string name="game_countdown_placeholder" translatable="false">3</string><string name="levelup" translatable="false">Level Up</string><string name="message_game_over" translatable="false">GAME OVER</string><string name="message_level_finished">LEVEL FINISHED</string><string name="message_to_menu">To menu</string><string name="message_try_again">Try again</string><string name="message_restart">Restart</string><string name="goal_message_restart_format_d">Restart level %d</string><string name="goal_message_next_level_format_d">Next level: %d</string><string name="goal_message_next_world_format_s">Next world:\n%s</string><string name="pre_start_screen_loading">LOADING...</string><string name="short_menu_continue">Continue</string><string name="short_menu_exit">Exit</string><string name="start_screen_play">Play</string><string name="start_screen_unlock_all_levels" translatable="false">Unlock all levels</string><string name="start_screen_gain_90_ep" translatable="false">Gain 90 ep</string><string name="start_screen_finish_world_1">Finish the first world!</string><string name="start_screen_to_gl_test_screen" translatable="false">Test GL Stuff!!!</string><string name="topbar_level_placeholder" translatable="false">Level: 24</string><string name="topbar_level_format_d" translatable="false">Level: %d</string><string name="settings_reset">Reset progress</string><string name="settings_credits" translatable="false">Credits</string><string name="settings_music">Music</string><string name="settings_sounds" translatable="false">Sounds</string><string name="unlock_message_placeholder">Ramp unlocked</string><string name="world_button_title_placeholder">Great world</string><string name="world_button_progress_placeholder" translatable="false">21/15</string><string name="bounty_message_resource_format_s" translatable="false">%s</string><string name="bounty_message_tool_format_s">%s unlocked!</string><string name="bounty_message_tool_slot">New slot unlocked</string><string name="bounty_message_shape_unlocked">New shape unlocked</string><string name="level_button_format_d">Level: %d</string><string name="price_button_buy">Buy</string><string name="price_button_upgrade">Upgrade</string><string name="playershape_name_ball">Ball</string><string name="playershape_name_clock">Clock</string><string name="playershape_name_hypno_spiral">Hypno</string><string name="playershape_name_pacman">Pacman</string><string name="playershape_name_smiley">Smiley</string><string name="playershape_name_wheel">Wheel</string><string name="playershape_name_sun">Sun</string><string name="playershape_name_blue">Blue</string><string name="playershape_name_locked" translatable="false">\?\?\?</string><string name="playershape_description_ball" translatable="false">Keep calm and roll on</string><string name="playershape_description_clock" translatable="false">Tick tack!</string><string name="playershape_description_hypno_spiral">Hypnotizes you for more fun</string><string name="playershape_description_pacman" translatable="false">PACMAN!</string><string name="playershape_description_smiley" translatable="false">Don\'t worry, roll happy!</string><string name="playershape_description_wheel">A nice car without the... car</string><string name="playershape_description_sun">Shine bright like the sun</string><string name="playershape_description_blue">Why am I blue?</string><string name="playershape_description_locked">A new shape for more fun</string><string name="task_empty">Empty task</string><string name="task_collect_stars_progress_format_ddd">Collect %d stars (%d/%d)</string><string name="task_collect_energy_progress_format_ddd">Collect %d energy (%d/%d)</string><string name="task_collect_stars_format_d">Collect %d stars</string><string name="task_collect_energy_format_d">Collect %d energy</string><string name="task_complete_world_format_d">Finish the %d. world</string><string name="world_button_count_format_dd" translatable="false">%d/%d</string><string name="tool_description_locked_format_d">You will unlock this mysterious tool at level %d</string><string name="tool_description_ramp">Roll up the ramp to gain height</string><string name="tool_description_spring">Shoots you in the air</string><string name="tool_description_magnet">You are pulled towards it. Just try it out!</string><string name="tool_description_bomb">Blow up all obstacles near the bomb</string><string name="tool_description_power_mushroom">This will give you super-powers for a few seconds</string><string name="tool_description_stasis">Freezes a certain area which leads to longer in-air time</string><string name="tool_name_locked" translatable="false">\?\?\?</string><string name="tool_name_ramp">Ramp</string><string name="tool_name_spring">Spring</string><string name="tool_name_magnet">Magnet</string><string name="tool_name_bomb">Bomb</string><string name="tool_name_power_mushroom">Mushroom</string><string name="tool_name_stasis">Stasis</string><string name="tool_level_format_d" translatable="false">Level: %d</string><string name="confirm_dialog_button_yes">Yes</string><string name="confirm_dialog_button_no">No</string><string name="confirm_dialog_placeholder">This is a beautiful ConfirmDialog placeholder!</string><string name="confirm_dialog_exit">Do you really want to exit the game?</string><string name="confirm_dialog_reset">Do you really want to reset ALL your progress?</string><string name="confirm_dialog_finish_world_1">Do you really want to finish the first world?\nYour old progress will be DELETED!</string><string name="tutorial_placeholder">This is a multiline placeholder\nfor all the tutorials I made!!!\nAwesome! - Isn\'t it?</string><string name="tutorial_welcome">Welcome to Endless Roll!\nHave fun!</string><string name="tutorial_place_tools">Click anywhere on the screen to place the ramp</string><string name="tutorial_place_ramp_gap">Try to place your ramp in front of the gap</string><string name="tutorial_place_ramp_obstacle">Great job!\nNow place it in front of the obstacle</string><string name="tutorial_place_ramp_air">You can even set a Tool in mid-air.\nTime carefully!</string><string name="tutorial_place_ramp_air_2">Now try again!</string><string name="tutorial_leveled_up_to_toolshop">Congratulations! You have leveled up!\nNow go to the toolshop</string><string name="tutorial_spring_equipped">Well done! Now you can start the next level</string><string name="tutorial_switch_tools_two_neccessary">For this level you will need two tools equipped</string><string name="tutorial_switch_tools_switch">Choose which tool to use by clicking on it</string><string name="credits_title" translatable="false">ENDLESS ROLL</string><string name="credits_author">by Julian Mutter</string><string name="credits_testers_title">TESTERS</string><string name="credits_testers" translatable="false">Tester1\nTester2\nTester3\nTester4</string><string name="credits_sounds_title" translatable="false">SOUNDS</string><string name="credits_sounds" translatable="false">„Fruit-collected“, „Glocken-good“, „Carillon-02-a“, „Carillon-02-b“, „Fireball-02“, „Fruit-appearance“, „Voltage-hum“ (noiseforfun.com)</string><string name="credits_music_title">MUSIC</string><string name="credits_music" translatable="false">\"Balloon Game\", \"Bit Shift\", \"Digital Lemonade\"\nKevin MacLeod (incompetech.com)\nLicensed under Creative Commons: By Attribution 3.0\nhttp://creativecommons.org/licenses/by/3.0/</string></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/styles.xml" qualifiers=""><style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
+    </string-array></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/attr.xml" qualifiers=""/><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/colors.xml" qualifiers=""><color name="primary">#17b3f5</color><color name="primary_dark">#1791f5</color><color name="secondary">#ffb637</color><color name="secondary_light">#ffeb37</color><color name="secondary_dark">#ff8e37</color><color name="secondary_little_transparent">#e2ffb637</color><color name="secondary_much_transparent">#57ffb637</color><color name="red">#ff0000</color><color name="black">#000000</color><color name="transparent">#00000000</color><color name="message_buttons">#daf10d</color><color name="settings_button_disabled">#c7b7b7b7</color><color name="toolslotDisabled">#715f5f</color><color name="toolslotDisabledSelected">#60715f</color><color name="toolslotEnabled">#db41e42b</color><color name="toolslotEnabledSelected">#b3d700</color><color name="background_message">#9d000000</color><color name="background_short_menu">#5b000000</color><color name="background_tutorial">#3d000000</color></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/dimen.xml" qualifiers=""><dimen name="credits_margin_between_categories">50dp</dimen><dimen name="tool_inspector_width">170dp</dimen><dimen name="shape_inspector_width">170dp</dimen><dimen name="tool_button_width">70dp</dimen><dimen name="tool_button_height">60dp</dimen></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/strings.xml" qualifiers=""><string name="app_name" translatable="false">Endless Roll</string><string name="placeholder_button">Click me!</string><string name="placeholder_textview">I\'m a text!</string><string name="placeholder_number" translatable="false">997.5</string><string name="settings_show_fps">Show Fps</string><string name="game_bomb_error_message">Set the bomb on an obstacle</string><string name="game_playerprogress_placeholder" translatable="false">0.0m</string><string name="game_playerprogress_format_f" translatable="false">%.1fm</string><string name="game_playerspeed_placeholder" translatable="false">0.0m/s</string><string name="game_playerspeed_format_f" translatable="false">%.1fm/s</string><string name="game_fps_placeholder" translatable="false">Fps: 00</string><string name="game_fps_format_d" translatable="false">Fps: %d</string><string name="game_countdown_placeholder" translatable="false">3</string><string name="levelup" translatable="false">Level Up</string><string name="message_game_over" translatable="false">GAME OVER</string><string name="message_level_finished">LEVEL FINISHED</string><string name="message_to_menu">To menu</string><string name="message_try_again">Try again</string><string name="message_restart">Restart</string><string name="goal_message_restart_format_d">Restart level %d</string><string name="goal_message_next_level_format_d">Next level: %d</string><string name="goal_message_next_world_format_s">Next world:\n%s</string><string name="pre_start_screen_loading">LOADING...</string><string name="short_menu_continue">Continue</string><string name="short_menu_exit">Exit</string><string name="start_screen_play">Play</string><string name="start_screen_unlock_all_levels" translatable="false">Unlock all levels</string><string name="start_screen_gain_90_ep" translatable="false">Gain 90 ep</string><string name="start_screen_finish_world_1">Finish the first world!</string><string name="start_screen_to_gl_test_screen" translatable="false">Test GL Stuff!!!</string><string name="topbar_level_placeholder" translatable="false">Level: 24</string><string name="topbar_level_format_d" translatable="false">Level: %d</string><string name="settings_reset">Reset progress</string><string name="settings_credits" translatable="false">Credits</string><string name="settings_music">Music</string><string name="settings_sounds" translatable="false">Sounds</string><string name="unlock_message_placeholder">Ramp unlocked</string><string name="world_button_title_placeholder">Great world</string><string name="world_button_progress_placeholder" translatable="false">21/15</string><string name="bounty_message_resource_format_s" translatable="false">%s</string><string name="bounty_message_tool_format_s">%s unlocked!</string><string name="bounty_message_tool_slot">New slot unlocked</string><string name="bounty_message_shape_unlocked">New shape unlocked</string><string name="level_button_format_d">Level: %d</string><string name="price_button_buy">Buy</string><string name="price_button_upgrade">Upgrade</string><string name="playershape_name_ball">Ball</string><string name="playershape_name_clock">Clock</string><string name="playershape_name_hypno_spiral">Hypno</string><string name="playershape_name_pacman">Pacman</string><string name="playershape_name_smiley">Smiley</string><string name="playershape_name_wheel">Wheel</string><string name="playershape_name_sun">Sun</string><string name="playershape_name_blue">Blue</string><string name="playershape_name_locked" translatable="false">\?\?\?</string><string name="playershape_description_ball" translatable="false">Keep calm and roll on</string><string name="playershape_description_clock" translatable="false">Tick tack!</string><string name="playershape_description_hypno_spiral">Hypnotizes you for more fun</string><string name="playershape_description_pacman" translatable="false">PACMAN!</string><string name="playershape_description_smiley" translatable="false">Don\'t worry, roll happy!</string><string name="playershape_description_wheel">A nice car without the... car</string><string name="playershape_description_sun">Shine bright like the sun</string><string name="playershape_description_blue">Why am I blue?</string><string name="playershape_description_locked">A new shape for more fun</string><string name="task_empty">Empty task</string><string name="task_collect_stars_progress_format_ddd">Collect %d stars (%d/%d)</string><string name="task_collect_energy_progress_format_ddd">Collect %d energy (%d/%d)</string><string name="task_collect_stars_format_d">Collect %d stars</string><string name="task_collect_energy_format_d">Collect %d energy</string><string name="task_complete_world_format_d">Finish the %d. world</string><string name="world_button_count_format_dd" translatable="false">%d/%d</string><string name="tool_description_locked_format_d">You will unlock this mysterious tool at level %d</string><string name="tool_description_ramp">Roll up the ramp to gain height</string><string name="tool_description_spring">Shoots you in the air</string><string name="tool_description_magnet">You are pulled towards it. Just try it out!</string><string name="tool_description_bomb">Blow up all obstacles near the bomb</string><string name="tool_description_power_mushroom">This will give you super-powers for a few seconds</string><string name="tool_description_stasis">Freezes a certain area which leads to longer in-air time</string><string name="tool_name_locked" translatable="false">\?\?\?</string><string name="tool_name_ramp">Ramp</string><string name="tool_name_spring">Spring</string><string name="tool_name_magnet">Magnet</string><string name="tool_name_bomb">Bomb</string><string name="tool_name_power_mushroom">Mushroom</string><string name="tool_name_stasis">Stasis</string><string name="tool_level_format_d" translatable="false">Level: %d</string><string name="confirm_dialog_button_yes">Yes</string><string name="confirm_dialog_button_no">No</string><string name="confirm_dialog_placeholder">This is a beautiful ConfirmDialog placeholder!</string><string name="confirm_dialog_exit">Do you really want to exit the game?</string><string name="confirm_dialog_reset">Do you really want to reset ALL your progress?</string><string name="confirm_dialog_finish_world_1">Do you really want to finish the first world?\nYour old progress will be DELETED!</string><string name="tutorial_placeholder">This is a multiline placeholder\nfor all the tutorials I made!!!\nAwesome! - Isn\'t it?</string><string name="tutorial_welcome">Welcome to Endless Roll!\nHave fun!</string><string name="tutorial_place_tools">Click anywhere on the screen to place the ramp</string><string name="tutorial_place_ramp_gap">Try to place your ramp in front of the gap</string><string name="tutorial_place_ramp_obstacle">Great job!\nNow place it in front of the obstacle</string><string name="tutorial_place_ramp_air">You can even set a Tool in mid-air.\nTime carefully!</string><string name="tutorial_place_ramp_air_2">Now try again!</string><string name="tutorial_leveled_up_to_toolshop">Congratulations! You have leveled up!\nNow go to the toolshop</string><string name="tutorial_spring_equipped">Well done! Now you can start the next level</string><string name="tutorial_switch_tools_two_neccessary">For this level you will need two tools equipped</string><string name="tutorial_switch_tools_switch">Choose which tool to use by clicking on it</string><string name="credits_title" translatable="false">ENDLESS ROLL</string><string name="credits_author">by Julian Mutter</string><string name="credits_testers_title">TESTERS</string><string name="credits_testers" translatable="false">Markus\nLukas\nMaurice\nLandmann\nRainer\nJohannes</string><string name="credits_sounds_title" translatable="false">SOUNDS</string><string name="credits_sounds" translatable="false">„Fruit-collected“, „Glocken-good“, „Carillon-02-a“, „Carillon-02-b“, „Fireball-02“, „Fruit-appearance“, „Voltage-hum“ (noiseforfun.com)</string><string name="credits_music_title">MUSIC</string><string name="credits_music" translatable="false">\"Balloon Game\", \"Bit Shift\", \"Digital Lemonade\"\nKevin MacLeod (incompetech.com)\nLicensed under Creative Commons: By Attribution 3.0\nhttp://creativecommons.org/licenses/by/3.0/</string></file><file path="/mnt/FE6CC35E6CC31077/Users/Julian/AndroidStudioProjects/EndlessRoll/app/src/main/res/values/styles.xml" qualifiers=""><style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="android:buttonStyle">@style/GameButton</item>
         <item name="android:textColor">@color/black</item>
     </style><style name="GameButton">
diff --git a/app/build/intermediates/manifests/full/debug/AndroidManifest.xml b/app/build/intermediates/manifests/full/debug/AndroidManifest.xml
index 33ff052..a1591e4 100644
--- a/app/build/intermediates/manifests/full/debug/AndroidManifest.xml
+++ b/app/build/intermediates/manifests/full/debug/AndroidManifest.xml
@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="de.frajul.endlessroll"
-    android:versionCode="6"
-    android:versionName="0.6.0" >
+    android:versionCode="7"
+    android:versionName="0.7.0" >
 
     <uses-sdk
         android:minSdkVersion="14"
-        android:targetSdkVersion="23" />
+        android:targetSdkVersion="26" />
 
     <uses-feature
         android:glEsVersion="0x00020000"
diff --git a/app/src/main/java/de/frajul/endlessroll/levels/worlds/World.java b/app/src/main/java/de/frajul/endlessroll/levels/worlds/World.java
index e187fcf..8e09c9c 100644
--- a/app/src/main/java/de/frajul/endlessroll/levels/worlds/World.java
+++ b/app/src/main/java/de/frajul/endlessroll/levels/worlds/World.java
@@ -20,12 +20,12 @@ public enum World {
             R.drawable.terrain_c_grass, R.drawable.obstacles_grass,
             R.drawable.backgrounds_game_grass),
     ICY_MOUNTAINS(R.drawable.world_previews_icymountains, R.drawable.terrain_t_ice,
-            R.drawable.terrain_c_ice, R.drawable.obstacles_snow, R.drawable.backgrounds_game_snow),
-    TEST_WORLD_GRASS(R.drawable.world_previews_grasslands, R.drawable.terrain_t_grass,
-            R.drawable.terrain_c_grass, R.drawable.juri_obstacles_grass,
-            R.drawable.backgrounds_game_grass, R.drawable.juri_background_game_grass_2, R.drawable.juri_background_game_grass_3),
-    TEST_WORLD_SNOW(R.drawable.world_previews_icymountains, R.drawable.terrain_t_ice,
-            R.drawable.terrain_c_ice, R.drawable.obstacles_snow, R.drawable.backgrounds_game_snow, R.drawable.juri_background_game_snow_2, R.drawable.juri_background_game_snow_3);
+            R.drawable.terrain_c_ice, R.drawable.obstacles_snow, R.drawable.backgrounds_game_snow);
+//    TEST_WORLD_GRASS(R.drawable.world_previews_grasslands, R.drawable.terrain_t_grass,
+//            R.drawable.terrain_c_grass, R.drawable.juri_obstacles_grass,
+//            R.drawable.backgrounds_game_grass, R.drawable.juri_background_game_grass_2, R.drawable.juri_background_game_grass_3),
+//    TEST_WORLD_SNOW(R.drawable.world_previews_icymountains, R.drawable.terrain_t_ice,
+//            R.drawable.terrain_c_ice, R.drawable.obstacles_snow, R.drawable.backgrounds_game_snow, R.drawable.juri_background_game_snow_2, R.drawable.juri_background_game_snow_3);
 
     @DrawableRes
     private int previewId;
diff --git a/app/src/main/res/layout/start_screen.xml b/app/src/main/res/layout/start_screen.xml
index 9153758..8e43190 100644
--- a/app/src/main/res/layout/start_screen.xml
+++ b/app/src/main/res/layout/start_screen.xml
@@ -27,7 +27,7 @@
         android:layout_marginLeft="10dp"
         android:layout_marginTop="2dp"
         android:text="@string/start_screen_unlock_all_levels"
-        android:visibility="visible"/>
+        android:visibility="invisible"/>
 
     <Button
         android:id="@+id/startscreen_gain_90_ep"
@@ -41,7 +41,7 @@
         android:layout_marginLeft="10dp"
         android:layout_marginTop="2dp"
         android:text="@string/start_screen_gain_90_ep"
-        android:visibility="visible"/>
+        android:visibility="invisible"/>
 
     <Button
         android:id="@+id/startscreen_finish_world_1"
@@ -52,7 +52,7 @@
         android:layout_alignParentTop="true"
         android:layout_margin="10dp"
         android:text="@string/start_screen_finish_world_1"
-        android:visibility="visible"/>
+        android:visibility="invisible"/>
 
     <Button
         android:id="@+id/startscreen_to_gl_test_screen"
@@ -63,6 +63,6 @@
         android:layout_alignParentTop="true"
         android:layout_margin="10dp"
         android:text="@string/start_screen_to_gl_test_screen"
-        android:visibility="visible"/>
+        android:visibility="invisible"/>
 
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 0a07973..198f930 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -112,7 +112,7 @@
     <string name="credits_title" translatable="false">ENDLESS ROLL</string>
     <string name="credits_author">by Julian Mutter</string>
     <string name="credits_testers_title">TESTERS</string>
-    <string name="credits_testers" translatable="false">Tester1\nTester2\nTester3\nTester4</string>
+    <string name="credits_testers" translatable="false">Markus\nLukas\nMaurice\nLandmann\nRainer\nJohannes</string>
     <string name="credits_sounds_title" translatable="false">SOUNDS</string>
     <string name="credits_sounds" translatable="false">„Fruit-collected“, „Glocken-good“, „Carillon-02-a“, „Carillon-02-b“, „Fireball-02“, „Fruit-appearance“, „Voltage-hum“ (noiseforfun.com)</string>
     <string name="credits_music_title">MUSIC</string>