Like Comfy's previous maps, I find this really hard to give a simple rating to. I played this map on Skill 0, and can't imagine playing it on a harder setting.
There's some incredibly impressive design and setpieces here (the final section is both visually impressive and also ties that into its new mechanic in a natural way)... but it's also *really hard* in places, including the final section, sometimes in ways that are super stressful.
Especially, the starlight damage mechanic in the final section made me feel pretty "constrained", despite being v cool - and when you add the rapid firing tracking turrets to the mix in the later parts, I was mostly just in a panic and not actually *looking* at anything anymore. (Which is a shame, because it means I didn't really know what was going on in the final room, "progress wise" because I was just running around.)
It's not clear to me how you could resolve this on Easy without actually removing one or more mechanics - the issue is the overload of having to manage too many "urgent" impulses all at once, when they're mostly conflicting.
That said, the entire design concept is very impressive - and the extra vores-from-the-sky encounter if you go back outside after doing the pre-gold-key-door section is very cool.
I found... 13/25 secrets - and I saw at least 2 more which I just don't have the movement skills to get to. (Unfortunately, one of those gives you the only rocket launcher in the map - a case where the map is harder for people who probably need the help more?).
Anyway, 4/5 - 5/5 design.