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Zool: Ninja of the Nth Dimension is a platform game originally produced for the Amiga by Gremlin Graphics in 1992. It was later ported to several other platforms and followed by Zool 2 in 1993.

Gameplay

The game is a pure platform game, relying on smooth, fast-moving gameplay. Its protagonist is Zool, a gremlin "Ninja of the Nth Dimension" who is forced to land on Earth; in order to gain ninja ranking, he has to pass seven lands, beating a boss at the end of each of them. The game contains a number of embedded minigames, including several arcade games, a scrolling space shooter and a game accessible only by making Zool play a certain tune on an in-game piano or finding certain invisible warp points.

Source:  Wikipedia