I'm on 6545, it's my understanding that if you have the updated windows program that you get more levels. I just wait for Wednesday morning for my 45 new levels😀
Just keep on keeping on😁. I'm at level 6500. Every week they only release 45 levels, I usually beat all of them in the first 36 hours, then I play for the heck of it. As Reno Hightower once said(Kurt Russell from a movie called the Best of Times) it's just a game.