The aiming is very choppy because it feels like my cursor is "on rails", or stuck in some kind of grid. Not representative of any modern shooting game I've played. I think this would teach the wrong habits if someone were to use it as an aiming coach.

You might want to look into this page - it slows my PC to a crawl :-(

So cool! but somehow the simulation does not work on firefox. the crosshair is just stuck in the middle

writeup on the rationale behind it: https://www.pramit.gg/post/i-made-an-aim-trainer

Interesting project! I am relatively skilled at FPS with a mouse, but would like to improve with my trackball (so that I don't have to change my setup when playing an FPS). This could cone in handy, though I imagine that there aren't multiple "mouse profiles" built-in? It could be useful for players to understand how much of a difference different mice make.

CS 1.6 scouts and knives was the ultimate aim trainer

Interesting project. One suggestion I'd make is to reduce the configuration complexity up front on new users. It is kind of overwhelming before you have a feel for how your settings translate to the actual training experience.