"This Ad helps keep the game free"
I know that there's no extra ad's here on Kongregate, but _really_? You already have a sponsor, but that ad helps keep the game free? I honestly don't think anyone would pay to play this game.
I seem to have run into an issue on wave 13 of survival - The game would keep running with no enemies on the screen without continuing on to the next level, I tried power hitting around the edges of the screen with the hammer, and dropping two nukes.