Pedal powered paddlewheelair

Climbing into the cockpit the two, fifteen foot, towering donuts to either side of you seem a bit daunting until you see the ripple your motion causes undulating the curving rubber membrane which houses the helium they tell you, will exactly offset your weight.
It's still hard to believe that this contraption will hover with you in it, but it's a little late for second thoughts as the stay pin is released, the burly guy to your left wearing the Ground Crew t-shirt shouts, "Pull back and pedal ya dipshit." "Pedal!"
Yanking the joystick towards your midriff causes the louvers directly in front of you, connected to the outer perimeter of each donut by a cable activated, tire chain looking series of retractable flaps, to begin pushing surprisingly large volumes of air downwards.
The cockpit you are strapped into is actually just a rigid sling resting on the lowest inner edge of each torus, upon two curved saddle shaped grapples with flexible rollers, holding your craft a mere two inches above the inner tubes. Your peddling causes them to turn and therefore the donuts to either side of you to rotate.
pressing the joystick to the left causes the flaps on the topside of your left torus to rise but the lower flaps on the right to engage and you begin spinning in a stationary circle, and forward on the stick has only your rearward louvers opening. You lose your meager altitude at a frightening rate but quickly regain it before taking out the ground crew.
Now, to figure out the paintball guns before heading up to the *fair game* altitude of the coliseum.