Duo Stack

Clone Engine

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About this game

Classic block-stacking, doubled.

Duo Stack takes the puzzle genre you know and flips it - literally. Gravity alternates between the ceiling and the floor after every single piece, so you are never just building up from the bottom. One drop falls from above, the next rises from below, and you have to manage both sides of the board at once.

HOW TO PLAY
- Pieces spawn from the top during a Ceiling Drop and rise from the bottom during a Floor Shot
- Clear lines from either direction to score
- Both stacks grow toward the middle of the board - let either one reach the center and it is game over
- Soft drop, hard drop, rotate, and shift - controls flip direction automatically to match the current turn

FEATURES
- A genuine dual-direction challenge, not just a re-skinned drop game
- Seven distinct piece colors, each shifting between a bright "ceiling" tint and a deep "floor" tint depending on which way it is falling
- Clean, modern electric-blue and laser-violet visual style
- Responsive drop, hold, and rotate controls built for touch
- Sound effects and screen-shake you can toggle off anytime
- Local best-score tracking, no account needed
- Pause anytime, resume anytime

Whether you are a lifelong stacking-game veteran or just want a five-minute puzzle break, Duo Stack asks a simple question: can you keep both ends of the board under control at once?