The New Tetris, Square mode of Tetris Worlds, and Lockjaw: The Overdose reward the player for creating 4x4 block squares out of four tetrominoes.
Building wide platforms into the top of a square in progress allows more than one square to be built at once, keeping options open for handling any tetromino.
Monosquares
Spiral L monosquare, on both sides:
Spiral J monosquare, on both sides:
Spiral T monosquare, on both sides:
L on the left and J on the right require a double slide (see below).
Double slide
The New Tetris uses smooth falling animation for tetrominoes.
The way this implementation mixes the falling animation with collision detection means that a tetromino can normally slide only one block under an overhang unless there is something on the floor to support it.
External links
