Trace a Chain — Tap a digit and drag through adjacent cells where each step is exactly +1 or −1. E.g. 3→4→5→6. Release to clear and score!
∞ Extended Mode — 1 and 9 also connect: 8→9→1→2.

Minimum 3 tiles — Chains shorter than 3 are rejected and shake. Longer chains score exponentially more points!

Sudoku Rules — Every row, column, and 3×3 box holds digits 1–9 exactly once. Tiles fall to the lowest valid position after clears — they won't land where they'd create a duplicate.

Drag to Swap — Drag from one tile onto an adjacent tile (just 2 tiles, not a chain) to swap positions. If the swap opens a valid chain, both tiles glow red — draw a chain through at least one of them to complete the move.

Cancel a Swap — While tiles are glowing red, tap the Undo booster to cancel and flip them back. No booster charge is consumed.

Gravity — After tiles clear, remaining tiles fall to their lowest Sudoku-legal row. This can set off new chains automatically!

Auto-Cascades — Runs of 4+ consecutive digits left on the board after a clear are automatically played as bonus chains. Each cascade level multiplies your score — watch the combo orbs light up!

Violations! — If a row ends up with duplicate digits side by side, the entire row explodes for bonus points. Same duplicate vertically = entire column gone!

Keep playing past the target! Hitting the target score earns 1 star ⭐ but the game continues. Reach 1.4× target for 2 stars, 2× target for 3 stars. Stars light up in the HUD as you earn them.

Bomb Finale — Once you earn 3 stars, each remaining move automatically plants a bomb on a random tile and detonates its entire 3×3 box for bonus points — then the win screen appears!

Tiles show colors instead of numbers. Chain by color order — each connects to the next shade in the spectrum. All other rules stay the same!