How to play Corefuse

Slide every core to one wall with the arrow keys, WASD, or a swipe. Two equal cores that collide fuse into their sum, doubling their value. Each slide also spawns a fresh core on an empty cell, so the grid fills as you play. Press Z to undo your last slide.

Reach a 2048 core to stabilise the reactor, then keep fusing for a higher score. A move that changes nothing doesn't count. When the grid fills and no fuse is left, the run ends.

Tips & strategy

• Pick one corner and keep your biggest core parked there; never break that anchor.
• Slide in only two or three directions to keep the layout ordered.
• Build a descending chain toward the anchor so fuses cascade in a single slide.
• Use undo to recover when a spawn lands in the wrong place.

Corefuse is a free 2048-style number puzzle online with no download — slide, merge, and chase the 2048 core right in your browser on phone or desktop.