Yeah didn’t have the time to test it on other people, but I realised it later too that the UI was a bit unintuitive. The inputs are draggable but it’s not so obvious, should have probably just used the slider widget.
Ran out of time to make a custom level mode. I also wanted to make a “practice” mode where you don’t have a time limit.
I do plan on maybe working on this a bit in the future to add more visual clues + explanation (like showing the tangent at 0 when changing the coefficient of x). That way it’s more educational.