Do Not Make 13

Play:

Full screen Touch: Drag a line from the ball on one side of the screen to the other. Tap once to start the music. Best in landscape. · Keyboard: Drag with the mouse. R or the Restart button restarts a level.

About:

A small, clever puzzle game by Pim Schreurs, made for js13kGames 2024 and placed 22nd overall of 171, 4th for innovation. Each screen scatters digits and symbols around a big 13; you drag a line from one side to the other to split them, and whatever ends up grouped together must not make 13. It starts as simply separating the 1 from the 3, then the plus and minus signs start counting too, and you find out how many ways there are to make 13. No instructions: working out the rules is part of it. This is the author's updated post-jam build.

Credits:

Made by Pim Schreurs (sirxemic), 2024. Published here under the MIT licence. Source code.

Phone check: 2026-09-29

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Tags:

puzzle · maths · minimalist · touch · js13k