Idea 2 - Space shooter game
How: A small “shoot everything you see” game is produced; the player can only shoot at other things, but avoiding enemy shots is done by the computer character (which could be humanoid or something more abstract).
The player's head can be tracked by using a wiimote; the player must motivate the computer character by shaking another wiimote (we are also considering voice pitch input).
What: The “pilot” character is not very predictable (due to drunkness, for example).
It may be that some pre-made face systems already exist; if not, we can have inspiration with Ken Perlin's face (and do a simplified version), or use a more abstract way.
Depending on how much one moves the wiimote, the character will change its behavior - shaking it too much could piss it off, so it would drive even more erratically, or could bring it to its senses, driving in a better manner.