Tetris

Tetris was a world in Videoland where everything is formed from square blocks and straight lines, including the populace itself. The entire video-world is held together by the Sacred Square, which generates a strong form of gravity that keeps the pieces of Tetris from flying off into space. Mother Brain nearly destroyed Tetris when she stole the Sacred Square, but she was stopped by the N-Team and Prince Lyle. Tetris was later taken over by the Puzzle Wizard, who was also defeated by the N-Team.

Comments

Based on the popular video game Tetris, obviously. The gravitational pull on Tetris' blocks is likely a reference to the ever-falling bricks in the actual game.