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Keystone
Tip, tumble, and lay each shape flat on its goal.
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Play Keystone Launches the game on mysmol.ai ↗ About this game
Keystone is a 3D rolling-block puzzle played on neon grids suspended in the void. Each level hands you one or more shapes, and your job is to tip and tumble every piece end over end until it comes to rest lying flat on its matching goal tiles.
Roll a piece off an edge and it drops away into the dark, so each move is a small act of spatial planning. Later levels layer in grey blocks you can shove and several pieces you must drive at once, turning simple tumbles into genuine head-scratchers.
With 69 hand-built levels, par scores, a three-star rating, undo, hints and even a built-in AI solver, Keystone glides from a relaxing roll to a serious test of spatial reasoning.
How to play
- Each level gives you one or more shapes and a set of glowing goal tiles.
- Roll the active piece end over end with the arrow keys or WASD (swipe on mobile).
- Stand it up, lay it down, and position it so it rests exactly flat on its matching goal.
- Stay clear of the edges — tip a piece into the void and it is lost.
- On multi-piece levels press Tab to change which piece you drive; lean on Undo or Hint when stuck.
Screenshots