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Move the peg around to swap its position with a neighboring tile.
When you make a move, there are 3 possible outcomes:
Good Move: You made a tetramino. +1 on your score.
Free Move: The tile you moved connects to one of its kind.
Bad Move: The tile you moved is isolated. -1 on your gauge.
In Twenty mode, you are allowed 20 bad moves until the game ends.
In Marathon mode, you start with 4 bad moves and gain one for each tetramino you make.
8 game presets: 2 modes (twenty & marathon) x 4 sizes (5,7,9,11)