also make it that you can choose your abbreviation list
make sure to add a lot.
Examples: YesNo (Yes for positive number No for negative number Maybe for 0), custom (you make your own abbreviation system like if you wanted the abbrevions "" "PW" "qO" gK" and "fE" with "paQ" before the abbrevions and make it go into scientific after the last abbreviation you would put in "AaIS.paQ:;PW;qO;gK;fE"), scientific (I think you know), log (says the number like this: 1e+[log10(number)]), and more that you make
also add achievements and secret achievements (secret achievements aren't for incredibly late achievements, they are for doing things like clicking a secret achievement 1 time and you design the other secret achievements)