The game above is the full version of SpectrumBurst, running in this page — no download, no install, no plugin. It is the same build as the iOS and Android apps: the same campaign levels, the same Daily Puzzle, the same colour-mixing rules, and the same account. Sign in and your progress moves with you between the browser and your phone.
Drag with the mouse or trackpad to swap two neighbouring crystals — the same gesture as a swipe on a phone. Match three or more of a colour to clear them. Everything else, including specials and boosters, is tapped directly on the board. There is no keyboard input, so nothing to memorise before you start.
Colour is the mechanic, not a label. Crystals fuse the way light does — red and green make yellow, and the ladder runs all the way to pure white. That is also why you will never see orange or purple on the board: mixing primary lights does not produce them. The How to Play guide covers the full fusion ladder.
The browser build renders with WebGL, so it needs a reasonably current Chrome, Edge, Firefox or Safari with hardware acceleration switched on. On an older machine the phone apps will feel noticeably smoother — the browser version is the same game, but it is working harder to draw it.
Progress follows your account rather than the device, so signing in with the same account here and on your phone gives you one save, not two. Signing in is what lets your progress survive a lost or replaced device. If something looks missing after a switch, Support has the fix.
Prefer it on a phone? SpectrumBurst is free on both stores, and your progress carries over.