Claude Opus 5.5
鹈鹕骑单车 · Pelican on a Bike
A pelican in a helmet and red scarf rides a vintage bike along the coast catching fish: a one-prompt Claude Opus 5.5 build.
- 799 KB
- 540 plays
- Source
- Casual
- Three.js
- Procedural
- Single File
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About 鹈鹕骑单车 · Pelican on a Bike
A white pelican in a helmet, sunglasses and a red scarf rides a vintage bicycle down a coastal road, swerving between lanes to catch fish. The sun goes down, the street lamps come on, and the ride carries on under the stars.
One sentence, one session
riba2534 made this as a capability test of Claude Opus 5.5 in Claude Code. The whole input was one sentence: generate a 3D page of a pelican riding a bicycle, using every ability you have, then upload it to a CDN. The model built, tested and deployed it in a single session, and the author says no line of code was changed by hand. Before delivery the model had a sub-agent review the code, which found and fixed 12 issues. After launch it tracked down an occasional black screen (a bloom pass spreading invalid pixels) and redeployed the fix.
What's in it
- Pelican and bike: procedurally modelled, with two-bone IK legs that actually turn the pedals, and a cloth-simulated scarf
- Coast: Gerstner ocean waves and breaking surf, and a day/night cycle from dusk to a starry, lamp-lit night (press N to jump ahead 3 hours)
- Sound: sound effects and generative music synthesized live in the browser, with the beat following your pedalling cadence
- Five cameras: free orbit, chase, side tracking, cinematic and the pelican's own point of view
- 14 achievements, five gears and a fish counter
- Phones: on-screen buttons and quality that adapts to the frame rate
Everything, including models, textures and sound, is generated by code. The build is a single HTML file of about 800 KB, bundled from 11 modules with esbuild.
Credits
By riba2534. The source is on GitHub, alongside two other one-sentence games from the same test: 运输船 3D and 飞车 3D.
鹈鹕骑单车 · Pelican on a Bike guide & tips
How to play
Ride, steer between lanes and catch fish. Each fish is worth 1, and a golden fish is worth 5. Leave the controls alone for a few seconds and the pelican drives itself to chase fish.
Hidden extras: click the pelican and it honks, click the bell and it rings, click the sea in the distance and a fish leaps out.
All 14 achievements
| Achievement | How to get it |
|---|---|
| 第一条鱼 (First fish) | Catch one fish |
| 金色传说 (Golden legend) | Swallow a golden fish (+5) |
| 十鱼到手 (Ten fish) | Catch 10 fish |
| 海岸渔王 (King of the coast) | Catch 50 fish in total |
| 起飞！(Lift-off) | Jump for the first time (Space) |
| 放手特技 (No hands) | Do the trick: wings out and front wheel up (T) |
| 杂技鹈鹕 (Acrobat) | Do 3 tricks |
| 时速 30 (30 km/h) | Reach 30 km/h |
| 疾风鹈鹕 (Gale pelican) | Go over 45 km/h |
| 骑行 1 公里 (1 km) | Ride 1 km |
| 骑行 5 公里 (5 km) | Ride 5 km |
| 夜骑 (Night ride) | Ride at night; press N to skip 3 hours ahead |
| 铃铃铃 (Ring ring) | Ring the bell 10 times (B) |
| 嘎——！(Honk) | Make the pelican honk (H, or click it) |
Gears: Q and E shift between the five gears; the stats panel shows cadence (rpm), gear and distance.
Controls
| Key | Action |
|---|---|
| W / ↑ | Pedal faster |
| S / ↓ | Brake (coasting makes the freewheel tick) |
| A / D | Change lane to catch fish |
| Space | Jump |
| T | Trick: wings out, front wheel up |
| B | Bell |
| H | Pelican honk |
| C | Switch camera (5 views) |
| Q / E | Shift gear (5 gears) |
| N | Skip 3 hours ahead |
| M | Music on / off |
| K / F | Screenshot / fullscreen |
| U / P | Hide interface / pause |
With a mouse, drag to orbit the camera and scroll to zoom. On a phone, use the on-screen arrow, jump, trick and bell buttons.
How to play 鹈鹕骑单车 · Pelican on a Bike online
Press Play Game above and 鹈鹕骑单车 · Pelican on a Bike loads from the author's own site (lf3-static.bytednsdoc.com) inside a sandboxed frame. There is nothing to install.
Under the hood it uses Three.js, Procedural.
On a phone, tap Play and the game opens fullscreen with its own touch controls.
The prompt behind 鹈鹕骑单车 · Pelican on a Bike
The exact instruction riba2534 gave Claude Opus 5.5. Copy it from the View Prompt tab above.
生成一个鹈鹕骑自行车的 3D 页面，尽可能把你所有的能力全部都用上. 然后上传到 CDN 上, 把访问链接给我
鹈鹕骑单车 · Pelican on a Bike FAQ
- Which AI made Pelican on a Bike?
Claude Opus 5.5, in Claude Code, from a single one-sentence prompt. The author, riba2534, published the source and the prompt on GitHub and says no code was edited by hand.
- How many achievements are there in Pelican on a Bike?
14, from catching your first fish to riding 5 km, going over 45 km/h, riding at night and ringing the bell 10 times. The full list is in the guide above.
- How do I catch the golden fish?
Change lane with A and D to line up with a golden fish and catch it. It's worth 5 points and unlocks the 金色传说 achievement.
- Why is this pelican game famous?
"Draw a pelican riding a bicycle" is a well-known informal test of AI models. This version takes the idea all the way to a playable 3D game.
- Is 鹈鹕骑单车 · Pelican on a Bike free to play?
Yes. 鹈鹕骑单车 · Pelican on a Bike runs in your browser for free, with no download, account or install. It loads from the author's own site (lf3-static.bytednsdoc.com).
