Marvin Tang's profile on Product Hunt

About

Indie game developer and web publisher. I build free browser games and run several online platforms, including phyfun.com (physics & casual games), sortfun.com (sorting games), and randtap.com (random generator tools). Always shipping something new.

Links

Badges

Tastemaker

Gone streaking

Maker History

Grow AI SkillsBrowser-local tools for safer AI workflows
Sep 2026
KitsetA fast hub of single-purpose browser tools
Jun 2026
2PlayerFunFree two-player games play with a friend on the same device
Apr 2026
SortFunSorting puzzle games water sort, ball sort, parking sort
Apr 2026
LumiGameLabFree educational games for kids — math, science, geography
Apr 2026

Forums

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1mo ago

Grow AI Skills - Browser-local tools for safer AI workflows

Grow AI Skills provides free browser-local tools for planning AI workflows, checking output changes, and auditing transcript accuracy. No API key or file upload is required, and every result is designed for human review.

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4mo ago

Kitset - A fast hub of single-purpose browser tools

Kitset is a growing hub of tiny, single-purpose web tools — word counter, JSON formatter, case converter, and more. Each does one job, runs entirely in your browser, needs no account, and loads in under a second. Open the page, do the thing, move on.

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6mo ago

SortFun - Sorting puzzle games water sort, ball sort, parking sort

Free platform dedicated to sorting puzzle games. 400+ games across 8 categories: Water Sort, Ball Sort, Color Sort, Parking Sort, Screw & Bolt Sort, Shape Sort, Object Sort, and more. All free, browser-based, playable on any device. No download required. New games added regularly.