A few things could be fixed

The thing Im having a problem with is that I feel you cant get 3 stars on the later levels without buying the power-ups. I dont want to buy all those power-ups because I want the special towers, and I know I dont need 3 stars to get those towers; but it just bothers me since I want to get 100% on the game. Maybe you can just make things a little more balanced. Then I will rate 5 stars.

Wii player8=) about Sleep Attack TD