COALESCE
Merge and multiply hexagons to become unstoppable, in a 2D pixel-art action game made in three days for Mini Jam 202.
Official site mochicut.itch.io, verified Nov 3, 2026. The developer's own itch.io page (mochicut), linked from the developer's note.com article.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — itch.ioitch.ioEarly access · Listed as “In development” on itch.io; submitted to Mini Jam 202: Power-upFree
Plays in the browser on itch.io. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About COALESCE
COALESCE is a free 2D pixel-art action game in the browser whose itch.io tagline is “Merge and multiply to become unstoppable!”. The developer, mochicut, describes the core idea in a note.com article as an Agar.io-style game in which regular hexagons merge, split and grow. It was made with Godot in three days for Mini Jam 202: Power-up, a 72-hour jam whose mandatory limitation was “Ridiculously overpowered”, and finished 27th overall in the official results, with third place for Concept. You move with WASD or the arrow keys and confirm with Space or Enter; the page warns of high CPU use because of the very large number of objects. In the article, the developer, an information-science university student making a first game, says they talked the ideas through with Claude Code and then had AI write all of the code, while they made the textures and handled the build and upload. It is listed on itch.io as in development.
How it was built
Partially verifiedThe developer says development was mainly in Claude Code: they sorted out the idea with it, decided together how each feature should work, and “そしてそれをベースにAIにコードを全部書いてもらった。” (then, based on that, had the AI write all of the code). The core mechanics took about three hours and the core loop one day; day two went on features, UI, bug fixes and logic reviews, and day three on building and uploading to itch.io. While the AI worked, the developer planned the next ideas and made the textures. The developer adds that Claude Code alone did not seem to handle speed tuning and algorithm choice well, that they used Claude Code's default model rather than Opus 4.5 with thinking, and that they might use Codex or learn more for that part next time.
A three-day jam build with Godot: the developer discussed the design with Claude Code, had the AI write the code and made the textures themselves. The developer notes that they accidentally deleted all the game data at the end of day one and spent the next morning rebuilding it.
- Engine / framework
- Godot
- Languages
- Not disclosed
- Team size
- Not disclosed
- Initial build time
- About three days (the core game loop in one day)Developer Reportednote (mochicut)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“そしてそれをベースにAIにコードを全部書いてもらった。”Verification notes: The AI claim and the three-day timeline come from the developer's note.com article of 21 Jan 2026 (17:51 JST), re-read on 4 Nov 2026, which links the itch.io page; it also says that “basically most of the implementation” was written with AI. Controls, the CPU warning, the engine (Made with Godot), tags and status come from the itch.io page, read the same day; it shows no publish date, so no release date is recorded. Jam dates, theme and limitation come from the official Mini Jam 202 page (run 16–19 Jan 2026, 160 entries), and the placement from its official results page: ranked 27th with 14 ratings (score 3.518), Concept #3 (4.286), Enjoyment #31, Use of the Limitation #46, Presentation #61. The jam page sets no rules on AI use. The article calls the game Agar.io-like; that is the developer's comparison of the idea. The article's footnote says the developer also thought Copilot CLI might be useful during development; we found no statement that it was used, so it is not listed as a tool. Code language is not stated. Nothing in the sources describes AI used during play. The game was not played.
Development history
- 16–19 January 2026
Made in three days for Mini Jam 202: Power-up, a 72-hour jam (theme Power-up; mandatory limitation “Ridiculously overpowered”), and submitted on itch.io.
The developer publishes a note.com article on finishing a first game with Claude Code in three days.
Developernote (mochicut)- After the rating period
Ranked 27th overall of the jam's rated entries (score 3.518 from 14 ratings) and 3rd for Concept.
Officialitch.io (hosted by ZahranW)
Game performance
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itch.io
Free in the browser (HTML5); keyboard. The page warns of high CPU usage.
Not publicly available: itch.io rating, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| 初のゲーム開発をClaude Codeと３日で完走した話 note (mochicut) · Japanese | Devlog | Jan 21, 2026 | Nov 3, 2026 |
| COALESCE by mochicut itch.io | Store page | Not confirmed | Nov 3, 2026 |
| Mini Jam 202: Power-up itch.io (hosted by ZahranW) | Official site | Not confirmed | Nov 3, 2026 |
| Mini Jam 202: Power-up — results itch.io (hosted by ZahranW) | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) mochicut | Official site | Not confirmed | Nov 3, 2026 |
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