Clear every red
How it's played
Swap two tiles to line up three or more of a color or shape. Nothing falls and nothing refills: what you match stays behind as a ghost that can't move, so the order you clear things in is the puzzle. Some tiles are words: line up RED IS GHOST and every red turns to a ghost. Each puzzle asks for one thing, like clearing every red.
How it's made
It's a single-page webapp in plain JavaScript, drawn on a canvas. Every puzzle, the daily ones included, is found ahead of time by a search and checked by a solver. The demo above runs the game's own engine and drawing code.