Hey! Nice game :D
The only downside is that... there's no sound, right? ^^;;
But besides that, I like the graphics, and the gameplay is simple enough for a casual run.
But... speaking of which, I've tried to jump in and play the game, and I really didn't understand what each tower did what, only after my first game over, and going through the tutorial is that I was able to really enjoy it :)
But, good job nonetheless o/ I like it.