1:1 scale: each square = one 40-unit square in the game. Black = wall. Rarity colors = spawn zones. Brown = player spawn.
Maps can be stored in your GitHub repo so they sync across devices. Add a Personal Access Token with repo scope to enable saving to GitHub.
Reload the game after saving. Only black walls appear in-game; zones control spawn and rarity %.
Keep map across updates: Click "Export for repo" to download custom-map.json. Add it to your repo as data/custom-map.json, then push. The game will load this map whenever the browser has no saved map (e.g. new device or after clearing data).