Space bar to go up (release to go down), Click to use Bullet time.
Helicopter isn't quite so fun when you pick up speed if you hold the space bar longer, or you have to hold down the space bar for a long time to get moving again after a fall. This one has simple physics, and bullet-time to go with it. In case you're wondering, there's no end to the game. Rack up as much score as possible, and write your best results in the review thing.