Idea: enchantments boost the speed rather than the amount.
Idea 2: add a notation that is standart at first but after nonillion it goes to scientific but the number in front is put behind so its something like e"35.63" rather than "7.5e203" (i know they are not equivalent)
Also maybe put BIG numbers. People like BIG numbers. like really really late in the game. Numbers over 1.79e308 if possible.
Also i love the music
I gotta say, your game has a lot of potential and I hope to see more in the future :D
YOu should add a save button even if it autosaves. Just do it. There is an irrational feeling of confort when there is a manual save button that you can use twice in a row for no reason
Yeah, all my games are made with HTML5, so they will work in near future at least