ISU, I've just passed your Fellow Heroes. Solution PMing . . .
Insane Steve, I've jst passed all of your 'Difficult' set except for 'Stairway to Somewhere'. I'll have to think about that one some more.
Persistence Builds Character - A reasonably clever level, but why 5 minutes?
Flooded basement - AAARRRRGH!!! =8O All the mindless building!
Beat the Clock - How much spare time is there supposed to be? I made it with 8 seconds remaining!
Dream Ledges - I really enjoyed this one. The terrain is kind of minimalist, but it's still a genuine challenge. Also, it feels somewhat reminiscent of my 'Centre of Attention', which was also inspired by a dream!
The Obstacle - The hint says that all skills are used except the blocker and bomber. It's also possible to do without the floater too.
4 Pillars and a Trap - Probably my favourite from the set! I solved it pretty quickly, but I like that it gives and uses one of every skill, and the target to save is the most that's possible. The time limit could do with tightening up, but now I'm just nitpicking.
Phone Call from Europe - Enjoyable to look at and to solve, and it even has a reasonable time limit! It seems a little easy to be the last in the set, Stairway to Somewhere should have been last. Also, what's up with the intro to this level? It's totally crazy!