I've been working on a voxel engine in my spare time for 10 years, this year. I wrote everything from scratch, from the memory allocators, font rasterizer and a programing language all the way to collision detection, renderer and gameplay code. It's been a journey!

https://github.com/scallyw4g/bonsai

https://github.com/scallyw4g/poof

Hey! I've seen bonsai before. Amazing work!