Holy smoke ! Those controls are hard !
Rolling a ball on belts (what could go wrong ?) Made me want to ragequit a bunch of time !
Only little feedback I can give is that you put clickable buttons but your games don't use the mouse in the gameplay. meaning you have to go grab you mouse in the middle of the play whish usually break gameflow for the player. You should let the player validate/navigate UI with the keyboard, and maybe bind your reset button to a keyboard key (you can look into EventSystem.firstSelectedGameObject if you don't know how :) )
Appart from that the game works well. Good job :)