To everyone thinking this game needs badges, this game doesn't need badges, first of all I don't think it has the API and second it's way too easy to beat all the levels there is a way to cheat around actually having to do it.
For start at Hard Mode use 4 Peon Towers one closing off the entrance on the bottom and then put them upward in a straightline (Leaving room for the critters to pass of course.) and upgrade the two on the end of the semi-maze, after you've been playing for a while use trasporter towers these are amazing!
35 seconds long and the ending (Which if I can work on it more won't be.) is awesome to me.
http://www.team-atemis.com/notessimo/saved/2008710185945609430.am