I invented a puzzle game by mistake. You can play it here: Picopon
This was supposed to be a clone of Tetris Attack/Panel de Pon, but I misremembered the rules of that game. In Panel de Pon, the player has to assemble straight lines, at least three blocks long, of the same colour; by contrast, Picopon allows any arbitrarily-shaped monochromatic cluster to score points. To me, that's more fun because it allows for bigger chains and combos. Okay, play it!