So I had a bit of trouble with level 2
The Bubble Run whilst filming the playthrough, which falsely gave me the impression that it's possibly too difficult to
be level 2. However, in hindsight it's probably because I was going for the most direct route, which is more difficult than other possible routes,
and I was doing so whilst filming, and talking to camera.
I had another few goes at it this morning and beat it first time every time. There is plenty of time and plenty of skills to take pretty much any route you feel comfortable with, and the ending isn't as difficult when you're concentrating on it fully.
So, I'm fairly happy now that it's in its rightful place as level 2
