ColorBurst fills a 6×6 grid with glowing neon cells, each displaying a charge number from one to four. Tap any cell and its charge drops by one. When a cell reaches zero it bursts, sending pressure outward to all four of its neighbours — reducing each of their charges by one. Any neighbour that also hits zero bursts in turn, sending its own wave outward. These cascades chain together automatically, and a single well-placed tap can clear enormous sections of the board in seconds. The goal of each level is to reduce every cell on the board to zero. The fewer taps you use to trigger the cascade that clears everything, the higher your score — bonus points are also awarded for each cascade triggered. As levels progress the starting charge values increase and the grid fills more densely, requiring you to identify the pressure point that will start the biggest chain reaction.