I'm building a modern platform for kids to hand draw their own games: https://breaka.club/blog/why-were-building-clubs-for-kids

Currently supports RPG mechanics, with digital card game support coming soon. Plan is to keep expanding what's offered.

Bits and pieces are already open source with more to come: https://github.com/BreakaClub and https://github.com/godotjs/godotjs/