Well, it had a nice difficulty curve and sufficient graphics, but my only complaint would be that there is no sequel. I can't wait to see what you'll do with the cliffhanger ending. *SPOILER ALERT* After the 10-11 Lv. the best thing to do would be to get the first level Dr. Octogonapus' son upgrade, while it is still cheap. 5/5 though, great game.