Grid Shift

Slide. Combine. Keep space open.

1. Slide all signals in one direction. Adjacent equal values combine once per move. Reach 1,024 to win.
2. Each effective non-winning move adds a 2 or 4. A move that changes nothing adds nothing. A full board with no possible merges ends the run.
3. Use arrows or W/A/S/D on the board, swipe, or use the four direction buttons. Escape pauses and Tab leaves.
4. Undo restores up to 32 earlier moves, including the exact next random tile. New run asks before replacing your board.
5. Runs save on this device when coordinated storage is available. Continue saved run restores the board and undo history. Conflicting saves offer a choice; unavailable storage permits page-only play. Scores are local and unverified.

Semantic row and column values, keyboard controls, swipe and non-drag direction buttons.. Spoken move summaries, 32-move undo, deliberate pause/resume and persistent numbered labels. No sound or animation is required.