It has 3 different characters: one is fast and floaty, one is heavy and slow, and one is in between. You have a stun gun with 2 firing modes: a regular shot and a homing shot. You zip and zap your way through the game using these tools.
The game uses SDL+OpenGL and is currently just for Windows, but I want to get it on Linux and Mac as soon as I can. I wrote the engine myself in C++.