The source is available on the greenroom, along with worksheets on how to write it - you can download it from http://greenfoot.org/greenroom/index.php/Paint_2

Looks like you've fallen foul to the case sensitive image problem from the error - either way it doesn't seem to work on the gallery at the moment. Are you using the latest version of Greenfoot (1.5.1)?

You might want to have a look at mik's marbles scenario for code on getting the balls to bounce off each other realistically - I think I stole that code for my snooker scenario as well, it does work well ;) Obviously this isn't finished yet, but keep going with it and hopefully it'll be good!

Ah good old bomberman... meant to get round to making a greenfoot bomber man but haven't yet. As for bits to do - well it'd be good to move a bit faster to start with, and after that, powerups, levels, etc. etc. - the limit is your imagination with this one!