The controls are sluggish and make precision jumping almost impossible. On top of that, the 'computer that taunts you' idea has been done to death. The entire game is built around a single gag and it's not even a very funny gag to begin with.
I love tower defense games and I fully enjoyed this game. The graphics, the mechanics, the leveling up, the challenge, all of it is perfectly balanced and a blast to experience. The only part of this game that lags for me is having to deal with the enemies with a "50%" chance to dodge an attack. Overall I'm sure it balances well between all the enemies as a whole but it is extremely frustrating to watch all my towers miss a single enemies over and over and over and over again as he rushes for one of the gems. It turns many of the maps into a luck based mission where no matter how I'm set up, they still get through because all their dodging effectively makes them invincible. Perhaps making it so that they dodged every other shot, or better yet, programming it so that sequential hits and misses become less likely as they happen more often to help prevent situations where the enemies dodge everything.
Other than that though, the game is incredible.