
Cindervale
An underground metroidvania bullet hell with a grapple hook and online multiplayer.
Official site mistercoconut.itch.io, verified Nov 3, 2026. The developer's own itch.io page (Mr. Coconut), linked from its official AI Browser Game Jam 5 submission page.
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.ioReleasedFree
Plays in the browser on itch.io. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Cindervale
A metroidvania with bullet-hell combat, set underground, in which you get around with a grapple hook. The developer says it has full online multiplayer and takes about three hours to complete. Mr. Coconut says the game was made entirely by Claude Code, using Opus 5.5, with some of the developer's own help. It was made in Godot for AI Browser Game Jam 5 and is free to play in the browser on itch.io.
How it was built
Partially verifiedThe itch.io page says the game was made entirely by Claude Code with some of the developer's assistance; the jam submission's AI Tools Used answer names “Claude Code using Opus 5.5!”. Neither says what the developer's own part was. The itch.io AI disclosure also ticks Graphics, Sounds and Text, but the page does not say how the art, sound or text were made.
- Developeritch.io page: “made entirely by Claude Code with some of my assistance!” — itch.io
- DeveloperAI Browser Game Jam 5 submission, AI Tools Used: “Claude Code using Opus 5.5!” — itch.io (AI Browser Game Jam 5, hosted by Focaccai)
Made in Godot for AI Browser Game Jam 5 (theme: Torch), entirely by Claude Code (Opus 5.5) with some help from the developer, per the itch.io page and jam submission. The web build's scripts are GDScript, and include a networking script for the online multiplayer (observed).
- Engine / framework
- Godot
- Languages
- GDScript
- Team size
- Not disclosed
- Initial build time
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“made entirely by Claude Code with some of my assistance!”Verification notes: AI use from the itch.io page and the AI Tools Used answer on the official AI Browser Game Jam 5 submission page, both re-read on 5 Nov 2026. “Made entirely by Claude Code with some of my assistance” gives no percentage, so no AI code share is recorded. The online multiplayer and the three-hour length are the developer's description and were not tested; the Godot build contains a networking script. Godot from the itch.io “Made with” field; GDScript observed in the build. Published 25 Oct 2026 (23:20 UTC). The developer also entered ECHOFALL and Wicklight in the jam; they are not recorded here. The page has a single short paragraph, so the game's description is limited to it; team size and location are not stated. The Godot build was checked for calls to AI services and none were found. Jam voting was still open on 5 Nov 2026 (it closes on 7 Nov), so no placement is recorded; the submission page showed 5 jam ratings (jam votes, not recorded as a metric). itch.io shows no public rating. The game was not played.
Development history
Published on itch.io (23:20 UTC) and submitted to AI Browser Game Jam 5 (theme: Torch), 5 days and 3 hours before the deadline.
AI Browser Game Jam 5 submissions close; voting was still in progress on 5 Nov 2026.
Officialitch.io (Focaccai)
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.
itch.io
Free in the browser (HTML5).
Not publicly available: itch.io rating, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Cindervale by Mr. Coconut itch.io | Store page | Oct 25, 2026 | Nov 3, 2026 |
| Rate Cindervale for AI Browser Game Jam 5 itch.io (AI Browser Game Jam 5, hosted by Focaccai) | Official site | Not confirmed | Nov 3, 2026 |
| AI Browser Game Jam 5 itch.io (Focaccai) | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Mr. Coconut | Official site | Not confirmed | Nov 3, 2026 |





