No.7 · H · 2026.10
HERMIT CRABHermit crab Paguroidea
Swap shells, start a chain of moving crabs, and find your way to the sea.
- Rule
- Step into an empty shell to move into it. When a shell exactly one size bigger is left empty beside another crab, it moves in and a vacancy chain begins. Reach the sea.
- Stages
- 30
- Controls
- arrows walk · Z undo · X restart · pause menu: restart / stage select
- Price
- Free, every stage, in the browser
- Rating
- —
- Made with
- PICO-8 ／ Komugi ／ 2026.10
The game loads only when you press play. On phones a controller appears below the screen.
gameplay
- Arrows walk. Step onto an empty shell to move into it — any size. Your old shell stays behind.
- The other crabs never walk. But when a shell exactly one size bigger is left empty next to one, it moves in — and the shell it leaves can pull the next crab, and the next. A vacancy chain, like real hermit crabs.
- Gaps in the rocks are cut to the size of the shell that fits. Breaking waves push back anything but the biggest shell.
puzzoole is a free monthly magazine of browser puzzles, one animal per letter from A to Z. Every game is made in PICO-8: one game, one rule, one letter. Real animal behavior, translated into puzzle rules.
FIELD NOTESthe animal, before the rule
Being written.
MAKER'S NOTESwhat we threw away
Being written.
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