Touchpaper: Chain Reaction

Every square on the board holds a fuse, and every fuse points one of four ways. You light exactly one of them. The spark runs along that heading until it reaches the next fuse still standing. That one lights, fires along its own heading, and hands the spark on again. You do not steer any of it. Your whole turn was the first tap. The board is cleared when the chain reaches every fuse. Miss one and the spark runs out of board with fuses still standing — which is not a failure so much as information. You can see exactly where the chain died and which heading let it out. So this is a game you read rather than react to. Nothing is timed and nothing is twitch: you trace the path with your eyes before you commit to it, and the board is small enough to hold in your head and tangled enough that you will still be wrong. Every board is generated and then solved before it ships, so a board that looks impossible has an answer. No timer, no way to lose, and it all works offline.