Quick tip: Press the "export" and then "import" buttons, then hold enter. You will suddenly start gaining money smoothly (at the cost of resetting HP of the material).
Notations not saving is a bug, I see and I fixed it. Notations don't trigger at smaller numbers because there's still enough space for thousand separators (gives a better feeling about how big the numbers really are)
Also, could you re-add the autobuyer feature and make it so that it costs a certain amount of number upgrades and you need to click it every so often (more time with higher level) to get it to work again. For example, the 1st upgrade could be 10 mins, then 30, 60, 100, 150 (adding the level*10 mins each time)
In an earlier comment, you said that scientific notation would be hard to understand. Since the game features exponents, how about scientific notation in the form of x * 10^y?
 "Idle Mine: Remix"){kind=icon}
 "Godot Number goes up"){kind=icon}
 "Endless Training 2"){kind=icon}
 "Yet another Merge Game"){kind=icon}
 "money clicker (my first game)"){kind=icon}
 "Particle Clicker"){kind=icon}
 "Incremental Adventures"){kind=icon}
 "Four Color Theorem - Coloring Puzzle Game"){kind=icon}
 "Brexit Clicker"){kind=icon}
 "Real Ant Simulator"){kind=icon}
 "Cube It (Testing)"){kind=icon}
 "Basic Idle 2"){kind=icon}
 "IdleByte 2"){kind=icon}
 "YAICG - Yet another idle clicker game"){kind=icon}
 "Idle God 2"){kind=icon}
 "Idle Letters"){kind=icon}
yes, always check if there's a next chapter, oh wait there is a bug...