Nice game - surprisingly fun, though short. It was a bit too tough to stay away from the zombies, since they have perfect pathfinding and move just as fast as you, and once they've caught up to you you can't shake them. I really liked how the items didn't respawn, though, so you had to make the most of limited supplies.

Also, I'm afraid I don't see the evolution.

Nice one, this minimalist game has most features one can expect from a shooter (including - slightly evolution-themed - powerups), except in very tiny and basic graphics.

It works well: random level generation, IAs, collisions, laser raytracing... Everything is fine, but the game is indeed quite difficult, as BMacIntosh mentioned it. Also, the game lacks some personality or something to make it stand out in some way.

Sorry, my graphics card isn't have what it takes to display circles and rectangles so I get "No suitable graphics card" error message...