This is the error that i got when i pressed start java.lang.IllegalArgumentException: Format of sound file not supported: 15488__djgriffin__tibetan_chant_4_colargol_2_modified.wav at greenfoot.Greenfoot.playSound(Greenfoot.java:141) at SoundLooper.start(SoundLooper.java:73) at OuterSpace.act(OuterSpace.java:121) at greenfoot.core.Simulation.runOneLoop(Simulation.java:274) at greenfoot.core.Simulation.run(Simulation.java:158) Which is weird, because Greenfoot supports wav...

Zerg! you forget the fantastic command of setPaintOrder, which allows you to set The order in which Greenfoot paints objects onto the world, thus solving your entire conundrum.

Ah, that was tricky to fix. Thank you, although i will not upload the new version yet, as i have actually started on the actual game, and i will wait until I finish the first part to upload it.