Lunar Mass
Free · play online in your browser, no download
Mine the Moon, power a base and build a mass driver to launch payloads, with fabricated bots to help scale it up.
Official site lunar-mass.vercel.app, verified Nov 3, 2026. The game's menu credits “By Logan Van Wagoner @lgvw3”, linking the entrant's X account lgvw3; also the entry URL in the official Vibe Jam 2026 games data.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleased · Updated after the jam; the menu says the mechanics have kept changing since the deadlineFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Lunar Mass
A 3D building and simulation game in the browser, set in a crater on the Moon. On foot you mine voxels of regolith, ice and ore, refine metal, place solar arrays, batteries, excavators, refineries and rails, connect them with power cables and charge a pulse bank, then fire payloads from a mass driver, with a predicted trajectory showing exit speed, orbit and impact. Fabricated bots help extend the railhead, and a surveyor's map lets you travel across the surface. The entrant pitches it as building the megastructure with an arsenal of bots while creating new lunar craters along the way, and says it was a way to learn about a lunar mass driver that the entrant hopes to turn into a much more realistic simulation later. It was made for the Cursor Vibe Jam 2026, whose rules required at least 90% of each game's code to be written by AI; the official submission lists Cursor as the tool, and the game's menu also credits Codex. It finished 637th of 945 entries. Free, for desktop browsers; the developer has kept working on it since the jam.
How it was built
Partially verifiedIn the official Vibe Jam 2026 submission the entrant lists Cursor as the tool and answers Yes to the AI-written field. The game's main menu adds a “Built with” list of Codex, Cursor, Quiver, Tripo, Meshy and GPT Image, and a note that work on the mechanics after the jam is “still 90%+ AI written”. Which model ran in Cursor is not stated.
- OfficialJam rule 3: at least 90% of the code has to be written by AI. — Vibe Jam (Pieter Levels)
- DeveloperMain menu: “I've kept working on the game mechanics (still 90%+ AI written) because I'm excited about the game.” — Logan Van Wagoner
Listed first in the “Built with” strip on the game's main menu; what Codex did is not stated.
Built for the Cursor Vibe Jam 2026 on Three.js with Cursor named as the tool; the main menu also credits Codex, Quiver, Tripo, Meshy and GPT Image (Tripo and Meshy are AI 3D-model generators). A note on the menu says the bots had bugs at the deadline that kept them from working properly for scaling, and that the mechanics have kept changing since, still more than 90% AI-written.
- Engine / framework
- Three.js
- Languages
- Not disclosed
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“I've kept working on the game mechanics (still 90%+ AI written) because I'm excited about the game.”Verification notes: Tool (Cursor), engine (ThreeJS), genre (“Adventure, Strategy, Simulation”), pitch, inspiration and the multiplayer (No), mobile (No) and portal (Yes) flags from the entrant's answers in the official Vibe Jam 2026 games data (submitted 1 May 2026, 11:44 UTC, on the deadline day; final rank 637 of 945 entries, no award); rule 3 on the jam page requires at least 90% AI-written code. The “Built with” list and the developer's note come from the game's main menu, re-read on 5 Nov 2026; the 90% figure in the note is about post-jam work and the jam rule, so no exact AI share is recorded. Developer: the menu credits Logan Van Wagoner with a link to x.com/lgvw3, the handle in the jam data (display name Logan, location Utah, USA, linking logan-vw.vercel.app, a portfolio under the same name); team size is not stated. The inspiration answer also mentions wanting to build a lunar mass driver with a real company's team one day; that is not repeated here. Mining, buildings, power, launches, bots and the map come from the game's controls and interface text; the leaderboard is marked “Coming soon”. The game was not played through. The script talks only to the jam widget; no calls to AI services were found (checked 5 Nov 2026). The jam page's widget counter showed 65 plays for lunar-mass.vercel.app on 5 Nov 2026 (observed; sessions, not players or downloads, so not recorded as a metric). The release date is not stated; the jam submission is dated 1 May 2026.
Development history
Entered in the Cursor Vibe Jam 2026 on the deadline day (submission date in the official games data, UTC); the jam required at least 90% AI-written code. Final rank 637 of 945 entries, no award.
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)
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 |
|---|---|---|---|
| Cursor Vibe Jam 2026 — rules, prizes and game stats Vibe Jam (Pieter Levels) | Official site | Not confirmed | Nov 3, 2026 |
| Vibe Jam 2026 games data (entrant submissions, final rank, awards) Vibe Jam | Official site | Not confirmed | Nov 3, 2026 |
| Lunar Mass (game page, main menu and credits) Logan Van Wagoner | Official site | Not confirmed | Nov 3, 2026 |
| Logan (@lgvw3) — X profile X | Social post | Not confirmed | Nov 3, 2026 |
| Logan Van Wagoner — portfolio Logan Van Wagoner | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Logan Van Wagoner | Official site | Not confirmed | Nov 3, 2026 |
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