The game is pretty decent, a bit boring after...The controls are a bit messed up, and sometimes Survival mode gets wayyyy too hard... and why aren't there any health packs for Survival?
3/5
Lv 20 is quite easy if don't plan on leaving the tower standing. Just use the winch, grab one of the blobs with the eyes on it, and pull. Be sure not to hit the wall, and fly past the tower before it slingshots back.