If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
What's so wacko about this race? Three things: top speed, recklessness, and going until your kart flies apart! Click with your mouse to initiate the speed and direction dial. Initial speed can be attained by clicking the mouse in the "sweet spots" on the dial. Once moving, steer the car using the mouse. Avoid obstacles and the wall to minimize damage and maximize speed.
Use mouse to interact.