Catculus
About this game
js13k 2025 entry by Antti Haavikko (creator of Coup Ahoo). A puzzle/strategy game with a black-cat theme, packed into 13KB.
Catculus is a free, open-source puzzle game playable directly in your web browser — no download, no signup, no plugins required. Originally built for the js13kgames competition in 2025, the entire game fits within a strict 13 kilobyte size limit — a remarkable feat of engineering. The source code is available on GitHub, released under the NOASSERTION license, allowing anyone to study, modify, or contribute to the project. Tags: js13k, cat, puzzle.
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