@Headgrinder: Welcome! The hints you've been dropping about your level-in-progress have certainly piqued my interest -- feel free to ask if there's anything you need a hand with.
"Going Left" shouldn't be in the list in the first post IMO. It's definitely Lunatic.
@GrayFace: The levels Hmpf quoted my list of in the first post are all good, popular, interesting levels that I wasn't able to play due to their being beyond my platforming ability and/or reflexes. If "Going Left" is indeed Lunatic, that doesn't really matter for LoCP purposes, as we're generally no more able to play a Very Hard or even Hard level than we are a Lunatic one... and even some Normal levels lead us to ragequit after racking up a couple dozen deaths in just a few minutes.
@PYP: Thanks for the recs, and especially for the links! I've played about half of those, but that still leaves several new levels for me to check out. Yay!
@Bulbapuck: Welcome to you too! DEtM is a great level, one of my favourites, and one of the first levels I played... but it does have two different fairly hard jumps in it, hard enough that it was only the high degree of enjoyment I'd been getting from the rest of the level that kept me trying for the 10-20 minutes (seriously) it took me to get past each one. And since there isn't another way around those two jumps, unfortunately "Don't Eat the Mushroom" can't get the official LoCP seal of approval. Happily, though, ProtonJonSA over at YouTube did an excellent three-part (to showcase all the endings) Let's-Play video series for DEtM, so even the crappest players can enjoy the full experience. I actually made a friend of mine download KS just so she could play DEtM, but for both my fiancee and my personal assistant, who have no platforming skills at all, watching the LP had to suffice.
@Aptequar: Welcome to you as well... Hopefully this means that your intriguiing-looking levels from the Level Previews forum will be LoCP-safe?
edit: Pumpkin ninja'd me! How could you forget Don't Eat the Mushroom? It has to be one of the single most brilliant KS levels yet made. I
it like crazy (even though one of those two jumps still
makes me crazy).