This is a short experimental game with one goal and an ending. The title is provisional. Human playtesting and demand validation are still pending. In-game lumen has no cash value. There are no purchases, advertisements, or offline rewards.
Collect 15 lumen, BUY a drill, then buy and upgrade three machines. Upgrade all to III and LAUNCH for 3,000. Hover BUY or UP to compare additional output. PAUSE / Esc stops production. SAVE stores progress in this browser; RELOAD restores the latest save, including automatic saves. A successful manual save restarts the 15-second automatic-save timer.
Browser storage is local to this website address and browser profile. Private browsing, clearing site data, or changing browsers or website addresses can lose access to saves. Corrupt saves are preserved and further saving is stopped. Do not rely on a prototype save as a permanent record.
The game has no account form, contact form, analytics SDK, advertising SDK, or payment integration. Progress stays in browser storage and is not sent by the game to a developer database. Loading the page and game files sends ordinary network requests to the hosting provider, Cloudflare. Cloudflare may process connection information such as IP address and technical request data under its policies. No claim is made that visiting the game is anonymous or that the host keeps no logs.
Cloudflare privacy policy. Browser data can be managed in your browser's site-data controls. Do not submit passwords, personal documents, or private details as feedback. A feedback channel has not been opened yet.
The project owner permits personal evaluation of this prototype in your browser. This permission does not grant ownership of the game, Unity software, or other third-party components. Do not redistribute the included engine separately, remove proprietary notices, or reverse-engineer its components except where applicable law permits. Third-party rights and any applicable mandatory rights remain in force. Unity and its licensors and service providers are intended beneficiaries of the protections stated here for their components and may enforce those protections where applicable law permits. Use the included runtime only as part of this game. If you do not accept these playtest conditions, do not start the game.
This experimental game and its included components are provided as available, without a promise of fitness, uninterrupted access, accuracy, or preservation of progress. To the extent permitted by applicable law, the project owner and the third-party licensors and service providers do not provide warranties or accept liability for losses resulting from prototype use. No exclusion applies where applicable law does not allow it. The playtest may be changed or withdrawn. No purchase or financial commitment is requested.
GPT created the code, game design, primitive models, shader, and automated tests under the project owner's direction. Automated checks are not evidence of human enjoyment or revenue. No external artwork or audio was purchased or imported.
Lumen Yard was made with Unity®. Unity is a trademark or registered trademark of Unity Technologies.
Copyright © 2005–2026 Unity Technologies. All rights reserved.
The project is not endorsed by Unity or Cloudflare. Their names identify the engine and hosting provider.
Information dated 2026-10-02.