Hello! Are you still working on the game engine? This looks well put. Also, where to look to start compiling this demo? Thanks!
Yes, definitely still working on the game engine. You can check out the GX project on github here:
https://github.com/boxgaming/gx
All of the example programs are in the samples folder.
You can also view the source for the sleighless demo and run it right in the browser here:
https://boxgaming.github.io/qbjs-samples/#src=sleighless.zip