Previously, I got stuck at XL13. In the past 48 hours, I've managed to complete that level and the next 7 Expert levels. I've arrived at the Big 5 as you guys say.
I have a screenshot showing proof of my completion of XL13 in the topic where I said I was stuck.
Anyways, wish me luck. If there's anything I need to know about what's ahead in these levels, let me know.
If there's a bug, YO! I'll report it!