well for a game you really do not need the arm movement, just the torso, so for moving you can use your arms as input.... being a bit imaginative you have this :
palm to advance (push forward for the throttle as it recognizes depth), close fist to stop, straight arm to the side for turning left and right, arm down for kneel, arm up to jump.... and for shooting, you use your other arm, as it's a mech, you use machine guns not single trigers, so you use arm up for rockets, palm for open machine gun fire, fist for stop fireing, and extanded arm to the side for shoot everything.
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