CumuLab: Group & Merge Puzzle

CumuLab is a number puzzle built on one rule: accumulate the indicated number of identical tiles. Each tile shows how many to gather — see a 3, bring three together — and they merge into a higher value. Keep merging the board's highest value to level up.

★ CHAIN REACTIONS ★

You choose where to slide. The first merge follows your setup. After that, spawned tiles can pile up into new groups and trigger chain reactions on their own — no input needed.

Some chains you plan. Others surprise you. Both multiply your score. These satisfying combos keep every session unpredictable.

★ BLACK TILES ★

Merges spawn black tiles alongside numbered ones. Black tiles take up space without contributing to groups. When two share a row or column, that line locks — you can no longer slide it.

Keeping them scattered preserves your options. Letting them cluster restricts movement. Managing this tension adds a layer of strategy to every decision.

★ GROWING GRID ★

The grid starts as a single tile. Each time you merge the current highest value, the board expands by one row and one column. Play for the victory at level 9.

★ FEATURES ★

★ Slide any row or column — tiles loop around edges
★ Accumulate tiles until the count matches their number
★ Chain reactions that multiply your score
★ Black tiles that lock lines when aligned
★ 9 unlockable modes for infinite replayability
★ Interactive tutorial to learn the mechanics
★ Playable offline — no internet required

★ FOR PUZZLE FANS ★

If you enjoy number puzzles, tile games, or merge challenges but want something fresh — CumuLab offers a different path. Accumulate, merge, and watch the chains do the rest. A brain teaser where combos reward patience and progress is never lost. Play an ever-new endless puzzle by mixing the various game modes unlockable after each victory!

The deeper you play, the more patterns emerge. Clean design. No time pressure. A number puzzle you won't want to put down.

Download CumuLab — accumulate, merge, climb. Nine stages of growing challenge await.