Posted on 23 October 18 at 13:28
Well, after struggling with this for weeks, No sooner do I post this than it starts working.
In case this helps anyone else get unglitched, here's what happened:
Was watching an ad, but it didn't load, and I got stuck at a black screen.
While in that stuck state, I switched to it Low graphics mode.
Had to kill it with the X in the top corner.
As expected, this lost all my progress since I'd last backed out.
Following a suggestion I'd seen elsewhere, when I restarted, I ran through the intro/tutorial on the first theme (Ancient Temple).
After that, I loaded up each theme in turn, doing a single spin on each to make sure it registered, but aside from the splash screen, I didn't get the tutorial again after the last one.
When I returned to the menu each time, my rank and coin balance was intact, so I went into Ocean to return to my 10 wild grind.
After adding around 600 XP, I backed out and closed the game completely. When I loaded it up again, my coin balance was correct, as was my collection status, and my xp. I'm now halfway to level 24, and it seems to be running fine for now.
Hope this helps someone else get unblocked.