神経衰弱 with ClaudCode
Free · play online in your browser, no download
A short memory card game: flip two cards, keep the pairs, clear the board against the clock. The developer's first game, made by giving Claude Code instructions in Japanese.
Official site unityroom.com, verified Nov 3, 2026. Linked from the developer's own note post (“▶ Unityroom：https://unityroom.com/games/simpleshinkeisuijaku”).
Where to play
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- Play free — official siteBrowserReleased · On unityroomFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
- Play free — itch.ioitch.ioReleasedFree
Plays in the browser on itch.io. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About 神経衰弱 with ClaudCode
神経衰弱 with ClaudCode is a small, free memory card game (shinkei-suijaku, known in English as Concentration) for desktop browsers, made in Unity. Sixteen cards in eight pairs are laid out in a four-by-four grid; you turn two at a time, matching pairs disappear and mismatches turn back, and the board is cleared against a timer shown at the top right. Clear times go into a ranking of the top three that is kept between games, there are separate sounds for flipping, a match, a miss and clearing, and a Retry button starts again at once. unityroom estimates about three minutes of play. It is the first game by the developer who posts on note as 真夏。 and who writes that they barely understand C#: the developer set up Claude Code with WSL2 and Ubuntu, described the game to it in Japanese, and kept adding the look, timer, ranking, sounds and retry with short requests; the unityroom page says the game was made only by giving instructions to Claude Code. The background music was generated with Suno from a prompt worked out with Claude, after Claude Code's own music turned out too thin. Free on itch.io and unityroom.
How it was built
VerifiedIn the note post (1 May 2026) the developer describes typing the game into Claude Code in Japanese (a 4×4 grid of eight pairs, cards that flip on click, matching pairs disappear, a clear message when all are gone, comments in Japanese) and getting C# scripts back within minutes that the developer says they could never have written, then adding a colourful look, a timer, a top-three ranking that persists, sounds and a Retry button with short requests: “Claude Codeとの作業は、コードを書くというより「指示を出す」に近かった。自分はディレクターで、Claudeがエンジニアという感覚だった。” (Working with Claude Code was closer to giving instructions than writing code. I felt like the director and Claude the engineer.) The final chapter is titled “コードゼロでもゲームは作れる” (you can make a game with zero code). The developer also asked Claude for help setting up WSL2 and Ubuntu, with the WebGL settings needed for unityroom, and for the Suno prompt.
- Developerunityroom description: “制作はClaudCodeへ指示のみ。BGMはSunoで生成、ペアヒット音は悪魔魂様より借用いたしました。” (made only by giving instructions to Claude Code; music generated with Suno; the pair-hit sound is borrowed from 悪魔魂). — unityroom (MidSummer)
The developer's first game. Claude Code wrote the C# scripts from Japanese descriptions in Unity 6, and the game was grown with short requests (look, timer, ranking, sounds, retry), then exported as WebGL with Gzip compression for unityroom. Background music generated with Suno (free plan, the first result used) from a prompt suggested by Claude; the pair-hit sound effect is credited as borrowed from 悪魔魂.
- Engine / framework
- Unity
- Languages
- C#
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Claude Codeとの作業は、コードを書くというより「指示を出す」に近かった。自分はディレクターで、Claudeがエンジニアという感覚だった。”Verification notes: AI use, features and publishing steps come from the developer's note post of 1 May 2026 (18:18 JST), re-read through note's API on 7 Nov 2026; it links both the itch.io and unityroom pages. unityroom (7 Nov 2026): title 神経衰弱（ClaudCode）, author MidSummer, posted 30 Apr 2026, updated 1 May 2026, about 3 minutes of play, 117 views, 1 rating and 1 comment (observed; too few ratings for a score to show). itch.io: title 神経衰弱 with ClaudCode, author MidSummerGames, status Released, HTML5, Unity, genre Puzzle, AI disclosure AI Assisted, Code, Graphics, Sounds, Text; no description, date, rating or download count shown. “ClaudCode” is the developer's spelling in both titles. The post says the developer could not write the code and only gave instructions, but gives no percentage, so none is recorded. The record's slug follows the unityroom address (simpleshinkeisuijaku). The pair-hit sound credit “悪魔魂” is quoted as written; the source of that sound was not checked. Shinkei-suijaku (Concentration) is a traditional card game, so no IP notice applies. In-game text language was not checked beyond the labels the post shows (TIME, RETRY); the Unity build was not inspected for AI service calls and the sources describe none during play. The game was not played.
Development history
Posted on unityroom (updated 1 May 2026).
Observedunityroom (MidSummer)The developer describes making the game with Claude Code in a note post and links the itch.io and unityroom pages.
Developernote (真夏。)
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
Free on unityroom (Unity WebGL); the page warns it may not run on smartphones.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
itch.io
Free in the browser (Unity WebGL).
Not publicly available: itch.io rating, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| コードが書けない私が、ClaudeCodeと一緒にゲームを作った話 note (真夏。) · Japanese | Devlog | May 1, 2026 | Nov 3, 2026 |
| 神経衰弱（ClaudCode） unityroom (MidSummer) · Japanese | Store page | Apr 30, 2026 | Nov 3, 2026 |
| 神経衰弱 with ClaudCode by MidSummerGames itch.io · Japanese | Store page | Not confirmed | Nov 3, 2026 |
| Official game page (language check) MidSummer | Official site | Not confirmed | Nov 3, 2026 |
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