TFH is a high-speed tetris clone that focuses on gameplay.

• "A":"rotate left"
• "jump":"na"
• "space":"hard drop"
• "fire":"na"
• "F":"toggle sfx"
• "down":"soft drop"
• "P":"pause"
• "S":"rotate right"
• "Q":"rotate left towards wall"
• "W":"rotate right towards wall"
• "Minus":"block projection"
• "movement":"right_left"

A random sequence of tetrominoes fall down the playing field. The object of the game is to manipulate these tetrominoes, by moving each one sideways and rotating it by 90 degree units, with the aim of creating a horizontal line of blocks without gaps. When such a line is created, it disappears, and any block above the deleted line will fall. As the game progresses, the tetrominoes fall faster, and the game ends when the stack of tetrominoes reaches the top of the playing field and no new tetrominoes are able to enter.