Video Game Idea #1

The main character of this videogame is clearly evil. His missions are clearly outlined at the start of each level (either by his own twisted mind or by some outside source. Possibly a hallucination that urges him to do ill). But the goal of the game( ideally) isn't to accomplish these fiendish plans, but rather to stop them. The player is in control of the main character's left hand. I'm not sure exactly how the control scheme would work, but the idea is that you use your control over the hand to thwart the objectives of the main character. As the game progresses you might be able to level up and control the whole arm, but at the same time the main character becomes aware that you are in control of his hand and he begins to work around it (no more ladders).

Alternately, the game could be played as a two player game, where one player is in control of most of the body and the other player is in control of the hand. They have digressing or opposite goals, and only one of them can succeed.