Kinda fun but...
Maybe I just fail at TD, but these are the dumbest (not as in lame, but as in unintelligent) towers I've ever used in a TD game. They sort of just spam their attacks randomly.
It seems like they target the nearest enemy always, and not lock onto the nearest enemy and then try to finish it off. This means that with the ridiculous rushes you've got set up it's completely impossible to stop everything without using piles of teleportation pads, which kinda ruins the whole TD thing.
Heavy mobs will stack up with quick mobs, and the turrets only end up shooting at each group once, and then letting them run by scott free. So way too frequently I'll see very low hp mobs escaping, while still in range of a turret, because your unintelligent turrets decided to attack a new mob instead of finishing off the current one.
The graphics are ok, there's almost no variation to your gameplay... the fact that the turrets are retarded is extremely aggravating... Nice start, but could do with a lot more.