Blog / Tag
Side Projects
Posts tagged side projects by Mattias Hising.
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Building a World Cup 2026 Fantasy Game for Fotbollsfeber
How I built a full fantasy football tipset for the 2026 World Cup — 104 matches, private pools, a phased scoring engine, and a knockout bracket — on top of an existing stats site.
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What I've Been Building in yetric/cart
yetric/cart started as a constrained little game runtime. It has turned into something more interesting: a cartridge model, a scene editor, runtime systems, small games to pressure-test the engine, and now a real console-like flow.
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I built a Mantine Theme builder
A visual tool for configuring Mantine themes — pick colors, adjust radius and spacing, and export a ready-to-use theme object.
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Fotbollsfeber: What I've Actually Been Building
A look under the hood of fotbollsfeber.se — refactoring an old codebase, building a Stryktipset probability engine, and what side projects are actually good for.