Atman’s 2D physics engine will be included, with full source. The entire codebase will be under gnu GPL.

One of the important things the participants learned is that physics engines can fail to be as general as you might think, and working around those limitations was a huge learning experience. (For example, the physics engine does not support bouncing–all collisions are essentially inelastic. Further, the technique Atman used to make large number of interacting objects stable also caused them to be somewhat sticky.) Halfway through the event, I thought we were going to “fail”–that most people weren’t going to come up with anything. This turned out to be around the turning point when people finally managed to interalize the limitations sufficient to really design. So while I encourage people to play with it and see up with what they can come, don’t start designing until you actually have the code.

BootLooter level 5 is bogus. (I originally built level 4 as level 5, and then when I saw I wasn’t going to have time to build another level, I copied it to level 4, accidentally leaving a copy as level 5. The gravity constants are per-level and in code, so level 5 has a lame ‘default’ gravity set… so it’s just level 4 with super-high gravity, and hence unwinnable.)