K3N8HReaction Time Tester
5 rounds, real millisecond timing via performance.now(), false-start detection — no download.
Click when the box turns green across 5 rounds; the game measures your real reaction time with the browser's high-resolution timer and rates each result against commonly-cited human reaction-time ranges. Clicking too early is caught and tracked separately as a false start.
Preview
Open full preview →This product is a live, in-browser experience — not a file to preview.
Free to play right now, in this browser, no download or account required.
Play now →Verified with an automated test script covering rating boundaries and false-start handling — all 7 cases passing.
What's included
- Live playable game at /play/reaction-time (free, unlimited plays)
- Commercial license: white-label/embed this game on your own site
Scoring logic (src/lib/reaction-time/engine.ts) is pure and unit-tested (scripts/test-reaction-time.ts) — 7 cases including all-false-start and mixed-round edge cases, all passing.
License & pricing
Free to Play
$0
For your own use on a single project. No resale or redistribution.
Embed / White-Label License
$79
Use across client work or resell the output. No reselling the source files/template itself.
Interactive Games — publishing standard
- Required deliverables: Live playable game, no download required, Commercial embed/white-label license (optional tier)
- Disclaimer required
- Proof-it-runs evidence required
- Personal vs. commercial license tiers offered
Runs entirely in the browser. Scope is stated honestly (exact number of careers/paths/events) rather than claiming to model everything.
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