Show HN: MudGym's WebAssembly browser playground for AI agents in MUD2

The post presents MUD2, one of the earliest online multiplayer games, compiled to WebAssembly and running in a browser tab, with much of the original C engine code, some dating to the early 90s, unchanged. The examples were built alongside MudGym, a reinforcement learning environment built around the game, and most are marimo notebooks running MudGym in Python in the browser through Pyodide.