Remix: Prison Realms

Build a small, playable browser game inspired by "Prison Realms" (RPG, Incremental).
Concept: Experience a web-based Minecraft Prison server featuring both multiplayer and AI-assisted single-player mines including AI assisted shopping that can be created, hosted, and maintained for free with zero prior programming or server management experience.
Tone/hook (from the game's own page): You're a prisoner with a pickaxe and nothing to lose. Mine valuable ores, sell them for cash, buy enchantments, and climb the rank ladder to earn your freedom—alone or with friends in the multiplayer….
Tech: use an HTML5 canvas; keep it to a single page that loads instantly with no login or install.
Controls: keyboard and mouse on desktop, shown on a short how-to-play screen.
Multiplayer: the original is listed as multiplayer. Start with a local or bot opponent, then add online play (e.g. WebSockets) once the core loop is fun.
Core loop: include progress saved in localStorage.
Steps: 1) get the core mechanic playable with placeholder shapes, 2) add win/lose conditions and restart, 3) polish feel, visuals and sound, 4) add your own twist (setting, character or one new rule).
Make it your own: don't copy the original's name, art, text or code.