Very solid game, but there are a few things I'd like to see changed:
1) My mouse is occupied 100% of the time collecting money; having an upgrade to have the magnetism increased would be fantastic, and/or numbered hotkeys for the "powers".
2) There should be a last tier of missions; robotic penguins are entirely unnecessary, zombie penguins can finish the game no problem.
5/5 already. I have faith this game will be popular.