Nice work! I wish I would have come across this sooner or I might not have started building https://webden.dev for the past year haha. PLAYCODE is definitely more robust as far as features (courses, virtual file system, pro version, users, node.js, transpiled projects, etc) but it's cool to see your big focus on speed. The rest of the ecosystem felt so heavy and bloated when I originally started looking.

Also, thanks for sharing your story! Very inspiring!