exergame design idea

My exergame will be a tank game. It will be called Shootaround and it will be a shoot 'em up tank exergame. It will use your feet to steer and aim your tank. These ideas com from We Ski and Wii Fit. your feet will be on a balance board like control. you wall lean your feet to turn and lean front and back to aim. The other idea will be a center of balance control. this will make it easier for different people to play. This will find their center of balance and orient directions for the tank based on this. People my age would want to play this because it is a shooting game and an exergame.