Excellent game.
I like how you have to pick the right creatures on the fly before anything else happens. The little red things just eat eat eat through the buildings, so it was really funny and cool. The only problem. I was at level 23, and my computer went into a heavy lag. I could only watch in horror as buildings grew, enemies broke through and having the game move at an alarmingly fast and choppy rate. It's not your fault though, maybe it's just my computer. Still, you did a good job at making a game from the other view.