Create a 3D animation using HyperFrames and Three.js for a cartoon kart racing intro, a game motion graphics trailer.
Make it a 2.5D cartoon, 3D-ish game.
It needs improvement on the hands holding the wheel.
Also add a fully playable stage demo.
You can do better in terms of graphics. We need chunky, colourful cartoon characters.
We need a way to turn this into a game ready for Android.
Car selector with powers.
Fix the stadium collisions, and the arrival.
The Blaze character has only one eye. Kinda scary.
Adapt the game to the D-pad remote and push it to my Sony Bravia TV as an APK.
Make it easy and fun to play with the TV remote, for kids.
Add Bluetooth controller pairing and split screen.
On the TV it plays alone. Fix the split screen: pick players and detect the gamepads.
Add an easy mode for solo play. It is too easy to hit the sides.
Let each player pick a character with their own remote or gamepad, coloured differently.
Add a gamepad tutorial. Easy buttons: triggers to drive, X for a nitro boost.
Make the cars able to jump and fly over ramps.
Add cool background music and sound effects with Lyria.
Add more tracks. Use Codex to generate the images.
Make it playable online with gamepads and split screen, on Mac and Windows.
Make it yours. Keep the order of the requests and change the subject: "a cartoon kart racing intro" in the first and "chunky, colourful cartoon characters" in the fifth. Leave out the Sony Bravia and APK requests if you only want it in a browser.
Cartoon kart racer for split-screen TV
Turbo Kartz, a chunky cartoon kart racer for one to four players with jump ramps, nitro, and four tracks, playable in a browser or on a TV with gamepads. Built in Claude Code over 20 short requests: 12 to Sonnet 5.5, then 8 to Opus 5.5.
“Ship early, hand the controller to someone else, and paste their complaints into the prompt box word for word.”
You'll need
- Lyria 3 Pro access for the music and sound effects
- Codex or another image model for the track pictures
- Android tooling and an Android TV, only for the APK requests
How it was made
The creator says the requests are "lightly trimmed"; the write-up adds "I fixed typos and trimmed a few for length." Claude Sonnet 5.5 built the game in the first 12; Claude Opus 5.5 fixed the TV split screen and added an easy mode, gamepad support, jump ramps, and more tracks in the last 8. HyperFrames made the trailer. The race and menu music and the sound effects came from three Lyria 3 Pro prompts, and the track pictures from Codex image generation given screenshots of the game; those prompts are on the same page. The video's opening animation is Gemini Omni Flash, not gameplay, so this entry starts after it.
Lyria 3 Pro at $0.08 per call, $0.40 logged for the music and sound effects. The creator didn't log tokens, so there is no figure for the code.
Claude Code · Claude Sonnet 5.5 · Claude Opus 5.5 · Three.js · HyperFrames · Lyria 3 Pro · Codex image generation
Source and credit
Blog · Oct 2, 2026
Authorship not stated by the source
Published instructions: Prompts page on the creator's site (Part 1 and Part 2), also listed in the write-up
Look notesby Reference
Gameplay of a chunky cartoon kart racer, from solo races to four-way split screen, cut with the creator's callouts and captions and ending on cost and prompt cards.
- Color
- Saturated cartoon colors: grey road with red-and-white kerbs, lime and mint grass, pastel trees, a pink candy track, and purple cards with yellow and green highlights.
- Type
- Heavy rounded display type for place and speed (1ST, 208 KM/H), player tags such as P1 · GAMEPAD 1, yellow callout boxes (CLAUDE the code, NEW ID AFTER SLEEP), burned-in captions, and a cost table titled THE WHOLE BILL · EVERY TOOL.
- Framing
- 16:9. A chase camera behind the kart with the HUD around the edges; split screens stack two or four views, and comparison shots put before and after side by side.
- Sound
- Narration in an ElevenLabs voice, per the video's cost card; the game's music and sound effects are from Lyria 3 Pro, according to the creator.
- Structure
- Two-player split screen, a pink candy track, a CLAUDE the code callout, a before-and-after of the invisible-road fix, a 7 wall hits test in manual mode, four-player split screen, a solo race, the bill of tools and costs, and 2 PROMPTS YOU CAN REUSE.
