Awesome game! I really apprecciate either style and gameplay.
Things that haven't convinced me:
I feel like the early waves are too hard, and the late waves too easy. Maybe is me, but I think that the game need a bit of balancement for the early, especially for the easy world. For casual gamer an harsh beginning can be a bit unfriendly.
I totally want to build towers under pre-existent units.
And, finally, it's too short :(
Anyway, loved it.
PS: FUUU THE BUBBLES
the guy in the laboratory is funny
Pretty cool, best defense strategy game i ever played, and i played plants vs zombies. But why not 5 stars? if you ask. well, the bubbles and bubble gun were disappointing and they turned out to be a waste of money and time. You could make it give a bonus cash for the beginning of every level. just sayin'.