Why can’t I get past level 620? I got a message that more levels will be available soon. Does anyone know what level the core goes to?
Mine stops at Crystal Core 620 as well. They release 10 at a time. I find that some get the next 10 before I do. I think it may be a beta group. Good luck.
Go to map, then world, and slide the selections to the right to get to expert levels. That will keep you busy for a while!