For the any% run, do you have to start on a new file, or can you use a completed file and just complete every level once with at least one star?

Any% run needs a new save file

I recommend this mod apk (https://www.mediafire.com/file/x35uvrpkjar8qa3/Angry_Birds_Go_v1.11.1_Hack.apk/file)

Everytime you spend coins or gems, they increase