LOL @ the endgame. With the tesla gun and infinite jumps, I just sat and pressed the up button for 20 minutes. I never thought a game could make me do that.
I've played this for a few hours now and really like it. I suggest the following improvements:
1. Separate sound and music controls
2. Moving around the map to gun shops and clone shops is tedious. Once a level is over, perhaps we could click on the minimap to select any completed level
3. Ammo conservation is boring, too much of the game is spent standing still while the soldiers shoot things. I suggest infinite ammo, with more or tougher zombies to compensate.
4. Vary the battles by forcing the player to move (rather than camping in the most defensible spot); perhaps zombies keep spawning until the player moves to exit the level, or destroys the spawnpoints.
Nice game.