AlexNisnevich/untrusted ? reverse-engineered prompt

Build me a browser game like a retro puzzle adventure where the player guides Dr. Eval through a strange machine world on a grid map, but the twist is that they solve each level by editing the JavaScript that created it. I want the screen to show the map plus a code panel or console, and each level should start out impossible until the player changes the allowed parts of the code and reruns it to open a path forward.

Please make it feel like a roguelike style puzzle game with multiple handcrafted levels, messages that introduce new ideas, and support for bonus levels or custom mods. It should include music and sound, basic debug friendly local development, and a simple way to build a release version. The level format should let some code be locked and some be editable so the puzzle design works.

Keep the overall vibe playful and a little mysterious. If you need to, look up current docs online, but please make the whole thing runnable locally in the browser.