I often come back to this level, it's definitely one of my favorites. There's some gameplay sections that I think would be bad level design if they were in any other level, like the entire last ship which is completely invisible, but here it just works. You don't have to see this level as something you want to beat, the level doesn't want to kill you. You can see this level as a friend. Once you get to know it well, you'll eventually beat it, but when you do, the level is not gone, you can play it again. Maybe you can try to find it's coins, maybe you can just play it over and over just because you want to. I don't feel like this with most levels, but I do with this one. Maybe I'm insane, I don't know.