しっぽ急便
Run, jump, glide and wall-kick across rooftops as a kemono-eared courier racing to deliver parcels on time. The README says Claude Code built it.
Official site tanuu5.github.io, verified Nov 3, 2026. Linked as the play address (“PLAY” / “ブラウザで今すぐ遊ぶ”) from the developer's own GitHub repository README (tanuu5/shippo-express); hosted on the developer's GitHub Pages.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About しっぽ急便
しっぽ急便 (TAIL EXPRESS) is a free 3D delivery action game for the browser. You play a courier with animal ears and a tail who picks up parcels from customers waving under pillars of light and runs them to the destination before time runs out; the pillar's colour shows how far away the drop-off is, faster deliveries pay more and add time, and tricks such as big jumps, glides, car-roof jumps and near misses with cars earn tips and combos while you carry a parcel. You dash, double-jump, glide with your poncho, wall-kick and bounce off awnings, paw-print jump pads and car roofs to take shortcuts over the rooftops of a town with a clock-tower square, shopping streets, offices, houses and a harbour. Time-up ends the run with a rank from S to D, and a stroll mode lets you explore the town with no timer. The README describes it as a Crazy Taxi-style delivery game played on foot, made as an original work aiming for that kind of play; it is unrelated to Sega's series and uses none of its names, characters, music or assets. The developer, たぬ (tanuu5), credits planning and direction to たぬ and development to Claude Code (Claude Opus 5.5, reasoning level MAX). The heroine was built in Three.js code from a single character image the developer supplied, and the town, people, cars, music and sound effects are all generated in code. In Japanese, made for PC browsers with gamepad support and touch controls; free on the developer's GitHub Pages site, with MIT-licensed code except for the heroine.
How it was built
VerifiedThe README credits planning and direction to たぬ and development to Claude Code (Claude Opus 5.5, reasoning level MAX). It says the heroine was built from a single character image that たぬ provided: the face, hair, ears, poncho, boots and tail are assembled one by one from Three.js shapes and formulas, the poncho is reshaped every frame to sway like a spring, and expressions switch between face textures drawn on a canvas. The town is generated from a fixed random seed, and the music and sound effects are synthesised with Web Audio. For checking, Claude set up frame-by-frame capture in headless Chrome on a real GPU and an automatic test player that makes deliveries, and played the game through repeatedly to check visuals and balance.
- DeveloperDeveloper's note post of 3 Oct 2026: five browser works, しっぽ急便 among them, were made with Claude Code (Claude Opus 5.5) and published on GitHub between 29 Sep and 1 Oct 2026. — note (たぬ / tank_ai)
Directed by one developer, with Claude Code (Claude Opus 5.5, MAX) building the game from the developer's direction and one character image. Built with Three.js and Vite and published to GitHub Pages by GitHub Actions; the game uses no image, 3D model or audio files. The README excludes the heroine's design, the code and data that build her model, and the screenshots showing her from the MIT licence.
- Engine / framework
- Three.js
- Languages
- JavaScript
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
- Source on GitHub (tanuu5/shippo-express, MIT; heroine excluded)
- Developer's note post on five games made in three days (Japanese)
Verification notes: AI use, features, controls, tech stack, licence terms and release date (2026-10-01, from the README's update history) come from the developer's repository README, read through raw.githubusercontent.com on 4 Nov 2026; the README links the play address, which loaded that day. The README names Crazy Taxi (Sega) as the kind of play it aimed for and states that the game is an original work using none of that series' names, characters, music or assets; in the note post the developer adds that in the end little of that original is left beyond the guide arrow. The bundled script contacts no AI services. The repository's stars and commit history were not checked (github.com was not reachable from our checker). Team size and location are not stated.
Development history
Game performance
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Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| tanuu5/shippo-express (README) GitHub · Japanese | Repository | Not confirmed | Nov 3, 2026 |
| Claude Opus 5.5 が3日間で作った5つのブラウザゲーム（PVつき） note (たぬ / tank_ai) · Japanese | Devlog | Oct 3, 2026 | Nov 3, 2026 |
| Official game page (language check) たぬ (tanuu5) | Official site | Not confirmed | Nov 3, 2026 |
