“Wandrer.earth is an exploration game where you win by going places you’ve never been before.
Discover hidden nooks, earn achievements, and get started on your quest to dominate the roads of your city.”
There’s also CityStrides, which looks really cool, but it’s focused on running.
Low-poly modeler
“Social Reading and Reviewing, Decentralized”
Game library based on p5.js.
I keep seeing very positive things said whenever this course comes up.
A list of tutorials for projects in various languages.
A free course taught by Peter Norvig
See also this JS emulator tutorial.
Open source home automation
See also his inspiration