Dr. Lee is an adventurous professor. He has built a rocket in which he wants to be launched as far as possible. He could use your help! Launch him at exactly the right moment and help him steer while in the air: that way he can collect as many bonuses as possible, allowing you to buy upgrades. You could get explosives for instance, or choose the ability to bounce back up when he hits the ground. You could also cut back on your exhaust fumes with the coins you collect. Everything has its price, so do you best to collect as much money as you can during Dr. Lee's rocket flights!
Use A or D to steer Dr. Lee while in the air. Use E to activate the engine of the rocket.