Just released an entry for the 32BitJam: Xtreme Skydive 3D!
You can play it in itch.io or check the source code on GitHub: https://github.com/JD557/xtreme-skydive-3d
There's a lot of stuff that could be improved but, while there's still a lot of time in the jam (until Friday), I will be pretty busy next week. Maybe I'll release a post-jam version with some improvements.
Either way, I'm happy that I finally "shipped a 3D game" with my software renderer.