Even now, Area Trouble is still your best level. Calmer, atmospheric levels are what you're best at, so I think you should try and expand upon those types of levels, especially since there isn't much competition.
I do think, though, that this one is a fairly close second. It's not for any apparent intended reason, though, there's really no sense of urgency, but I think that actually works towards this level's credit. It has an almost dream-like quality to it, because of things like the repeated rooms and the frequent tileset changes. This is further reinforced by having you rescue yourself at the end. To legitimize this, you should change the music to "Presenting VVVVVV", and the name to something subtle about being asleep. That would really make this level shine.