I've not heard of Neverball. From the site, https://neverball.org/

> Tilt the floor to roll a ball through an obstacle course before time runs out. Neverball is part puzzle game, part action game, and entirely a test of skill.

Nice map/level tool!

17 megabytes of sloppy Rust (I am so tired of this crappy language) code to accomplish what can be done in 4mb or less of C++.

"curveball"|"curve generator" it's called a spline, felicia.