I go into SAC#1 and it just plays normally.
Its working for me - to some degree 
Stuck at 7th cube right now.
Yes its working now
… but stuck at 1 of 6. I must have completed 10 cubes all at 1 of 6
Echo fixed this around 10 this morning. See if it works now.
Yeah it was still there around lunch time UK but this evening its no longer stuck, but theres no tutorial anymore - I’m back playing normally in Starbust Challenge