I.T. Kid

Crystal Clear is a match-five puzzle. You pick out groups of crystals of the same colour with the mouse, and a group of five or more bursts and scores; the bigger the group, the more it is worth, so the game rewards setting up one long chain rather than taking the first four you see. The board refills from the top, which is what makes the next group possible.

Not every crystal behaves like the rest. The heart ones recolour their neighbours, the locked ones will not move until they are freed, and the broken ones take out the tiles around them. It is a GameSheep game by WitchHut, built in warm brown and gold, and it is the patient end of the match-game family: no timer, no hurry, just the board.