Game Controller Concept - QWOP

For my Game Controller concept, the game I would to take a look at and design a controller for would be none other than QWOP. For those who don't know, QWOP is a ragdoll-based browser game where the controls are only Q,W,O and P and are used to control respective parts of the character's body to try and have him run. For my first sketch, I would have two potentiometers that would control each type of body part such as one for the Thighs and one for the calves, having the near maxed values determine which combination to fire while the middle fires nothing. For the second sketch I repeat the basis of the first one but rather than using values to determine if and when to fire I'd use the sound senor to determine when to fire based on the player's voice. For my final sketch I would have four motion inputs that allow for gesturing near each input in order to fire the command in game.