Match or slide neighboring crystals of the same tier so they combine into the next color on the spectrum. Higher tiers score more and open tougher clear goals. Boards shift mood across aurora, coral, forge, mist and void themes while the merge rule stays consistent.

Home, play, clear, stages, spectrum and language screens share one prism world — soft glow, geometric gems, no cold settings-app chrome. Stages unlock as you clear goals; a spectrum view shows the tier ladder so you always know what you are building toward.

Input is tap/drag to merge adjacent gems on touch, with pointer equivalents on desktop. Undo/hint tools appear where the mode allows without cluttering the board.

The canvas fills phones and desktops and reflows in portrait or landscape. Eight languages ship in the interface. Local save keeps stage progress and settings. Online ranks accept a nickname when connected.