Great game. =]
I enjoyed playing this game. Although--For a suggestion. Maybe you could limit the amount of arrows and all that allowed on the screen. Personally, I'm the type to just put out a bunch of towers and sit back and watch all the waves get pwned. But over time of doing this, it became very laggy. For others that do this as well it's really annoying when things start going really slow. Especially since I also near the end wanted to just sell them all and just put out a bunch of infantry, once I stocked up on money. Just a suggestion though, it's really helpful. ;)
Nonetheless, it was a real fun game. Keep it up =]