You play the white knight against a computer knight. Every square a knight lands on gets a pile of radioactive poop, and nobody can land there again. Keep hopping until the other knight has no safe square left, and you win. Run out of moves yourself and you lose.
It is a knight-movement game in disguise. To stay alive you have to look ahead at which squares your knight can reach and which ones are already used up. Turning sounds on is highly recommended.
You can't capture the other knight. Three difficulty levels change how well the computer plans ahead.