Review time:
You're meeting all of my standards, help.
Allow me to gush about this level for a bit before moving on to criticism, because this definitely is a refresher from all the monotonous and repetitive levels I see around here. This level does so much stuff right it's ironic how a level from someone who hasn't touched the engine in years appeals more to me than the general stuff I see floating around.
Enemies placed intelligently to both help the player progress, but aswell provide a challenge without being unfair, dragon coins which are actually easy to get, gimmicks which are mixed and matched and expanded upon in multiple ways. This is like a dream, haha.
While I would by no means call this a perfect level, it's easy for me to say that it's one I have enjoyed a lot, despite its difficulty. I really like some of the ideas you've incorporated into this level, such as the grinder (yes that's their name) ride near the end of the first half. I can tell this level was touched up a lot to make the areas feel just right, which is something I clearly don't see enough around here.
I really like your approach when designing, but there's one rather major issue I've had with this level, which is that it tries a bit too much.
I probably could forgive this if you used
multiple midpoints, but as it stands the progression in terms of difficulty and the amount of stuff there is in this level feels kind of janky and over the top. For example, I think having a midpoint before the aforementioned grinder ride would be a good idea as I can see it as a common spot where the player would die (I know I did a few times).
As for quantity of good stuff, I find it kind of sad how some of the ideas you had were just one-time occurances, such as the moving layer in the start or the attach-to-layer dragon coin. They're easily overshadowed by the two main gimmicks of the level and it makes me wonder if it wasn't better if this level was split in two - one about grinders and one about pipes.
I'm gonna continue that thought process here because I think I get the intention of switching things up right there after the midpoint, but I think each half does provide enough content to fill in a full level each (albeit without secret stars, most likely, unless you dedicate some side-areas to them).
Overall, I found this level to be very enjoyable. You have definitely not lost your touch (or at least hit a very specific sweet spot with this level). I'd just watch out for where to stop adding stuff in the future. It's weird because everyone else I tell the exact opposite.
8.2/10, moved to Pretty Good.
Hope to see more of your stuff in the future!