It's still a little glitchy, but this is an OK physics engine. W = Jump A = Left D = Right S = Fast-Fall The lines outlining him are for collision detection. There will be a full game involving this engine.
The latest version is V F. V B-1 - Initial Beta Release. Adds basic physics control. V B-2 - Fixed air jumps and added fast-fall. V B-3 - Added bouncy ground. V 1.0 - Added lava. V 1.1 - Added lives. V F - Final release. All mechanics are working. Full game coming soon.