All in all, other than the lack of 'return' statements at the end of blocks where 'getWorld().removeObject(this)' is used (which is causing a lot of 'IllegalStateException' throws), the code to this is not bad. The one thing, code-wise, that I did notice was your use of 'getWidth' in the 'paint' method of the world that should be 'getHeight'. The only other thing, which deals with the music, is that some of your sound files have tag information included with is causing ArrayIndexOutOfBoundsException throws. Re-saving the files without the tags should resolve that.
2014/5/15
2014/5/15