I think its pretty good, has alot of potential if its touched up and improved abit.
8 minutes for one level though? Thats abit steep and gets abit boring, as theres no way of knowing how many waves there going to be.
Needs more buildings, a next wave button etc..
3/5 at the moment, 4/5 if it gets better :]
Okay.. 3/5.
I'm sure theres something dodgy about the collission detection though...
Either i'm majorly tired, or its saying i'm hitting things when i'm not. (Usually occurs when it hits directly on top)