tl;dr: A developer built Canon, a web-based multiplayer MUD, to teach his 8-year-old daughter to code, inspired by HyperCard's accessible "view source" ethos. The game uses a deliberately limited scripting language called Cant—optimized for learnability over efficiency—where players create rooms, items, and NPCs with text, images, and simple state (marks and numbers), and everything is cloneable and hackable by design. It includes an optional daily LLM "Wish" feature for generating starter items, and is currently in invite-only beta.