Comunidad Game Maker

Al exportar un juego a apk, cuando ya lo creo y lo pongo en la ubicacion del pc para guardarlo y todo empieza a cargar y eso, me sale un error (o varios) que nose que son ni porque salen. Segui este tutorial https://www.youtube.com/watch?v=POS2M5Co7vU  por si hay algún error en el video o algo agradeceria que me avisaran.
Sale esto  :'( :
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
  [taskdef] Could not load definitions from resource emma_ant.properties. It could not be found.
     [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: C:\Users\Usuario\AppData\Local\Temp\gm_ttt_10000\gm_ttt_96988\src\com\FastAppGame\Happy_World_Cup_2014\Gamepad\Gamepad.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.

BUILD SUCCESSFUL
Total time: 3 minutes 2 seconds
jarsigner: unable to sign jar: java.util.zip.ZipException: invalid entry compressed size (expected 1718 but got 1737 bytes)
Verifying alignment of C:\Users\Usuario\Desktop\Happy World Cup 2014.apk (4)...
      51 assets/game.droid (OK - compressed)
   29696 assets/splash.png (OK)
  132368 res/drawable/bkgrnd.png (OK)
  132608 res/drawable/close.png (OK)
  133072 res/drawable/close_button_normal.png (OK)
  134760 res/drawable/close_button_pressed.png (OK)
  136804 res/drawable/closebutton.png (OK)
  137896 res/drawable/default_video_poster.png (OK)
  141384 res/drawable/facebook_icon.png (OK)
  141584 res/drawable/icon.png (OK)
  165840 res/drawable/leftarrow.png (OK)
  166592 res/drawable/refresh.png (OK)
  167272 res/drawable/rightarrow.png (OK)
  167812 res/drawable/unleftarrow.png (OK)
  168532 res/drawable/unrightarrow.png (OK)
  169408 res/layout/main.xml (OK - compressed)
  169874 res/layout/mraid_browser.xml (OK - compressed)
  170533 res/layout/userpasslayout.xml (OK - compressed)
  171198 res/layout/video_loading_progress.xml (OK - compressed)
  171792 res/raw/mp3_snd_bote.mp3 (OK)
  176428 res/raw/mp3_snd_game_over.mp3 (OK)
  187556 res/raw/mp3_snd_point.mp3 (OK)
  198931 res/raw/mraid.js (OK - compressed)
  202470 res/xml/preferences.xml (OK - compressed)
  203075 AndroidManifest.xml (OK - compressed)
  205088 resources.arsc (OK)
  215236 res/drawable-hdpi/close.png (OK)
  217144 res/drawable-hdpi/facebook_icon.png (OK)
  217372 res/drawable-hdpi/icon.png (OK)
  218380 res/drawable-ldpi/close.png (OK)
  219724 res/drawable-ldpi/facebook_icon.png (OK)
  219956 res/drawable-ldpi/icon.png (OK)
  222488 res/drawable-mdpi/icon.png (OK)
  226288 res/drawable-xhdpi/close.png (OK)
  228956 res/drawable-xhdpi/icon.png (OK)
  253196 classes.dex (OK - compressed)
1860643 com/adwhirl/assets/ad_frame.gif (OK - compressed)
1860906 res/values/attrs.xml (OK - compressed)
1861247 jsr305_annotations/Jsr305_annotations.gwt.xml (OK - compressed)
1861465 jsr305_annotations/v0_r47/V0_r47.gwt.xml (OK - compressed)
1861643 lib/armeabi/libopenal.so (OK - compressed)
2019447 lib/armeabi/libyoyo.so (OK - compressed)
3185128 lib/armeabi-v7a/libopenal.so (OK - compressed)
3337568 lib/armeabi-v7a/libyoyo.so (OK - compressed)
4467019 lib/mips/libopenal.so (OK - compressed)
4654307 lib/mips/libyoyo.so (OK - compressed)
6241655 lib/mips-r2/libopenal.so (OK - compressed)
6422129 lib/mips-r2/libyoyo.so (OK - compressed)
7355956 lib/mips-r2-sf/libopenal.so (OK - compressed)
7548633 lib/mips-r2-sf/libyoyo.so (OK - compressed)
8502019 lib/x86/libopenal.so (OK - compressed)
8656186 lib/x86/libyoyo.so (OK - compressed)
10063476 META-INF/MANIFEST.MF (OK - compressed)
10065256 META-INF/CERT.SF (OK - compressed)
10067088 META-INF/CERT.RSA (OK - compressed)
Verification succesful
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
unknown

Tengo un problema y es que estoy haciendo un juego parecido a flappy bird y los obstaculos (en flappy bird los tubos) no consigo que queden cada uno a un lado de la pantalla y siempre se "unen". Estoy siguiendo un tutorial en ingles (que no se apenas asi que hago lo que puedo) os dejo el video y en que minutos explica la parte de codigo en la que tengo el problema:

https://www.youtube.com/watch?v=iG7X2JkWM-Y
(min 8:45)

y el codigo que introduje es este (la parte del error creo que estan en los numeros):
alarm[0] = 60;
var position, spread;
position = random(300)+150
spread = 150
instance_create(room_width,position - spread/2,obj_porteria);
instance_create(room_width,position + spread/2,obj_porteria2);"

Tambien dejo las medidas de los obstaculos y el tamaño de la room por si es de ayuda:
-Obstaculos: 70x405
- Room: 429x768

Imagen del problema: