Kinda buggy - After wave 200 something the waves stop working...
I had a livestream running, you can see it here: http://www.youtube.com/watch?v=Ci5mkyQBnMQ

Lacking features of a proper TD game, but of course I spent limited time working on it, what would you expect? ;)

Instructions on how to play in the game by pressing F1. Also:
Q/W - Wave Up/Down
A/S - Give/Take $10
E - Resets wave
F3 - Debug (shows fps, number of enemies, etc)

Please note: Made on Game Maker on Ubuntu running on Wine - I have not yet tested this on Windows! Please tell me if there are any bugs!