Gameplay
The left/right steering controls are typical of a racing simulation game, except that the up arrow key causes Tux to “paddle” with his flippers. Correct use of the paddle command is essential to getting good race times. Paddling slows Tux down when at a high speed but speeds him up at slow speeds. Paddling when in mid-air may also be used to increase the length of a jump. Jumps can be caused by the shape of the landscape or by holding down the "energy" key (usually e) and releasing it. Releasing the key when a jump is imminent will naturally make a larger jump. Versions with other controls instead of keyboard exist; for example, wiimote and an arcade version with a steering wheel.
Points are also scored by collecting herring that are scattered along the various courses. In order to progress to the next level of the game you have to both collect sufficient herring and reach the end of the course within a preset time limit. Like many open-source games, the replay value of Tux Racer is extended by easy modification of the game. New maps can be created by making three raster images to indicate height, surface, and object placement.
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