This arcade action game uses only a single button to play: the [space] bar on your keyboard. Press and hold the key to charge up the power bar at the bottom of the game window, and then release it just before you wish to effect a jump. The small blue bouncing ball moves along on its own until the key is released, at which time it will jump relative to the power shown.
Timing is everything in this game, as the name suggests, with one bad jump often ending it all. The thing to remember here is that the key must be released before the ball touches the ground prior to the jump you wish to make.
The presentation in this game is exceptional with the highlight being a nice vertical sliding effect that both begins and ends the game. It is a nice design choice as it complements the vertical orientation of this arcade climber.
Another nice touch is the concept of conquering platforms as the basis for its high score system. By reaching an unconquered platform, the player is given the opportunity to enter their name. Platforms are "owned" for 20 days, at which time they become unconquered for the next player to come along and claim. It's a novel approach to engaging the player with an incentive to give it just one more go.