public Vector getAcceleration(){
		Vector accel = new Vector(0,-12);
		
		if( isOnGround ){
			accel.x = controller.getX()*3;
		} else if ( controller.getButtonJump() && jetpackFuel > 0 ){
			accel.x = controller.getX()*12;
		} else {
			accel.x = controller.getX()*1;
		}
		if( controller.getButtonJump() && jetpackFuel > 0 ){
			accel.y = 10;
		}
		return accel;
	}