Nice :) A couple things could be fixed though: (1) This is purely a graphical thing, but a ball 'blows up' it seems to flash big for an act() frame before going small and growing (hard to explain, but you can probably see what I mean from playing) (2) This second one was a problem I encountered when making http://www.greenfoot.org/scenarios/4716 (my version of the game) when the moving balls are doing collision detection, they treat the large circles like squares (presumably you're using getOneIntersectingObject(...), and that just treats the image as a square, regardless of transparency). The problem this causes is that they can hit nothing and blow up.. I'll let you dream up and code the solution, but a clue that might start you off might be to incorporate getObjectsInRange(...) somehow. Like I said though, I won't say more than that for now

@jrlowe, you can import the 'ScoreBoard' class by selecting 'Edit' and 'Import class' from the greenfoot menubar. Creating a new ScoreBoard() object will show the UserInfo data of the top so many scores and the scores of those nearest the current user's score. Your scenario will have to update the UserInfo data as scores are registered for it to show anything (other than zeros). Refer to the UserInfo class documentation.