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CursorCoding & Dev2026-10-14

Have a critic agent check your game against real footage until nothing looks fake

Golden Hour Skatepark gameplay: a skater rolls across a beachside park at sunset (video thumbnail from the author's post)

@prasenx asked Claude to build a browser skateboarding game, then had a separate critic agent compare captured frames with real skatepark photos and skate footage. The project's making-of says AI agents built it in Cursor in about 28 hours: pass 1 found 54 issues, including tricks that floated for about 0.95 s against 0.37 to 0.41 s in real footage, and the loop ran until the critic returned PASS. The game is live on GitHub Pages and the code is open source.

Try it yourself

What you get

A builder/critic loop where a second agent judges only what's on screen against real references, so done means it looks right.

Tools

  • Cursor
  • Claude
  • Real reference photos and footage (e.g. Wikimedia Commons)

Time / cost: Author: about 28 hours over 5 builder/critic passes

Steps

  1. Script fixed camera shots and a manual frame clock so every capture is repeatable.
  2. Collect real reference photos and clips of the thing you're simulating; record source and licence.
  3. Run the critic on media only and get a findings list with a Keep list of what must not regress.
  4. Have the builder answer item by item with a fix map, then run the critic again until PASS.

Copy-ready prompt

You are the critic. You will get only screenshots, keyframes and clips from my build, plus real reference photos and footage of [SUBJECT]. Do not read the code. List everything that looks fake as: Fake (which frames show it), Real (which reference shows the truth), Fixed when (what a fix must look like). Tag each item BREAKS, NOTICEABLE or MINOR. Add a Keep list of what already works and a Not shown list of captures you need next time. End with PASS or FAIL.

Prompt written by AgentPlays, based on the project's MAKING-OF.md. Check the output yourself and approve before anything is sent or bought.

Watch out: Issue counts and build time come from the author's own logs. Use reference media for comparison only and check licences before shipping any of it.

Proof / source

Open-source code Author's X post with gameplay video (Oct 14, 2026), the live game at starknightt.github.io/skate-park, and the open-source repo with a making-of that logs each pass.

In their words

i asked claude to build a skateboarding game then an agent compared it to real skatepark footage and found 54 things that looked fake five rounds later it found nothing. 28 hours and two power cuts later, it's live

— @prasenx on X

Read the original source ↗

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