So, a few weeks ago I downloaded the pay version of GRave Defense HD and I'm freakin' hooked. I've been playing this game obsessively. It is a great tower defense game but as you get farther along it gets very hard. There were a couple of levels I probably played 20 - 30 times on the "normal" setting before beating them. Often just one correct configuration of towers and placement will work and that can take a lot of trial and error to figure out. Oh, and I HATE the kamikaze mutants! So, does anyone else have this game and what are your thoughts on it?