Shin KoiKoi
A polished hanafuda card game, implemented in two days with Claude and Godot.
Links go to the official store or developer page. Last verified Nov 3, 2026.
Where to play
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- View on itch.ioitch.ioReleased · Windows, macOS, LinuxFree
Download from itch.io.
Desktop · itch.io
About Shin KoiKoi
A free desktop version of Koi-Koi, the classic Japanese hanafuda card game. Solo developer MORINAGA (hogwartz.inc) wrote that implementation took two focused days, after about three weeks of design work, with Claude writing roughly 70% of the UI scaffolding under direction while the developer supplied the game logic, iteration and feel decisions. It is built in Godot with C#.
How it was built
VerifiedClaude wrote roughly 70% of the UI scaffolding under the developer's direction. The post does not say whether this was Claude Code or the chat app.
Claude as a pair programmer for UI scaffolding; game logic, iteration and feel decisions (animation timing, spacing, colour) by the developer.
- Engine / framework
- Godot 4.6.2 .NET
- Languages
- C#
- Team size
- 1 (solo)Developer ReportedDEV Community (MORINAGA)
- Initial build time
- About 2 days of implementation (after ~3 weeks of design)Developer ReportedDEV Community (MORINAGA)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
Verification notes: Tool, share of AI work and dates from the developer's own article; platforms and price from the itch.io page.
Game performance
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| I shipped a polished hanafuda card game in 2 days with Claude and Godot DEV Community (MORINAGA) | Devlog | May 2, 2026 | Nov 3, 2026 |
| Shin KoiKoi on itch.io itch.io | Store page | Not confirmed | Nov 3, 2026 |
