Crab and Fish is a physics puzzle about removing things carefully. A crab stands on a structure of blocks and you click blocks to delete them — the goal is to reach the fish below without the crab losing its footing and falling.
It's the reverse of a building puzzle: you're demolishing while maintaining balance, which means thinking about what's holding what up before every click.
Remove blocks that aren't bearing the crab's weight, and take material from both sides evenly. Removing everything from one side tips the structure even if the crab isn't standing there.
A puzzle — each level has a solvable order of removals, and the physics is the constraint rather than the point.
Yes — tap blocks to remove them. Nothing to install.