I do really enjoy physicsbased puzzlers, and I must say that this is one of the most original ones I've seen in a long time! The pretty basic graphics do work very well with the gameplay, especially with that dope motion line.
The game is definetley very difficult, I guess especially if you're not familiar with Fourier's Circles (me hehe), but the gameplay loop was aslo definetley still fun enough to keep going! I do still think it might have benefitted from something that could make it easier for people if they wanted to, something like a pause function mid-try that could help people figure out where they're going wrong maybe?
But overall really enjoyed it, great job! :D