If I had an entire week, then I could beat up to like 1.5k-1.6k levels. I do have a 2nd account that decided that after logging out and back in, that it wanted to skip 11,000 levels, which made it show that I completed 11k levels that week
Update on this glitch: it is now only possible if you completely reset the game (I think that this can be done by deleting and reinstalling it however, unless you have an account synced between 2 devices so that it saves your boosters, then doing this will just get rid of any boosters that you have.
Just a tip, if you want the old map (you need a king account or another type of account that you can sign in and out of) then just sign out of your account and then close the game, when you sign back into your account the old map should be there, after reopening the game a few times, the new map will return but at least it…