Stack the well like any falling-block puzzle, but with one twist: you can undo your last drop to fix a misplace, at the price of the whole well falling faster for the rest of the game.
Move and rotate falling pieces to complete and clear horizontal lines in the well. When a drop goes wrong you can rewind it, but each rewind adds a permanent speed penalty, so you ration them and live with most of your mistakes.
Rotating falling pieces to complete and clear horizontal lines is Tetris, created by the Soviet software engineer Alexey Pajitnov in the mid-1980s.
The original addition is a costly undo: a bad drop can be rewound, but each rewind adds a permanent speed penalty.
Tetris has never had an undo, and the reason is structural — the game is a conversation with your own accumulated mistakes. Pricing the undo keeps that intact while making it a decision: most errors you still live with, and the ones you buy back have to be worth the speed you will carry for the rest of the run.
Rewind Drop reimagines the classic line-clearing falling-block puzzle by adding a costly undo, turning mistake-recovery into a strategic resource. It is an original, free browser game on PlayPendium.