Well you should let it continue until it finishes tomorrow. It was only my opinion.
I have some time to play at the moment, but not huge ammounts. Maybe I was unlucky but I had no success flicking the ball up there after 30 minutes of trying. I didn't even get close to a solution that I thought I could work on. I refuse to use compression to make launchers because they never win.
I like a challenging level, but I like the challenge to be in small bite sized chunks. That way I feel like I'm having some success and that feels good
That keeps me interested.
Larger levels with a number of smaller problems to solve are my idea of a nice B league level. Super difficult, or super lucky solutions are not really my taste. If I haven't had any success after 30 minutes I usually give up. But I'll spend 4 hours tweaking a level to perfection once I get things working in the right direction.
It's all just my opinion and my playstyle. Maybe others can post what they like so we can make B league levels that suit as many people as possible.