Setting Your Game Thumbnail

Your game's thumbnail is the image players see on the RUN.game Explore page, in search results, and on shared links. A good thumbnail makes your game stand out.

How It Works

Place a file called thumbnail.jpg in your project's public/ folder. The image must be exactly 512×512 pixels — the deploy command will fail if the dimensions are wrong.

my-game/
├── public/
│   └── thumbnail.jpg
├── src/
├── game.config.json
└── ...

When you run rundot deploy, the CLI automatically picks up thumbnail.jpg from public/ and uploads it with your build.

The deploy command will fail if you have not changed the thumbnail from the default one. Replace the default placeholder with your own thumbnail.jpg before deploying.

Replacing the Default Thumbnail

Projects created from a template include a default placeholder thumbnail. You must replace it with your own image before deploying — the CLI will not allow a deploy with the default thumbnail.

Tips

• Dimensions: Exactly 512×512 pixels (required; deploy fails otherwise).

• Keep it simple — the thumbnail appears small in search results, so bold colors and minimal text work best.

• Show gameplay — screenshots or stylized game art help players understand what your game is about.

• File format: JPG (.jpg). Keep the file size reasonable for fast uploads.