I found this game via JeffMB who popped up in our iRC channel asking about some OSX work we had done. I'm a developer for Bitfighter which grew out of the original Zap! demo to show off GarageGames' Torque Network Library (TNL).
This game looks really good! I'm going to show it to my kids as an alternative to 'neverball' which keeps giving me vertigo...