Underused concepts?

[AdrenalinDragon]

I think we need more levels like this, too. Shattered was a CCLP3 highlight, and I have a level in my set where you have to get a chip every second to win (Chips required = time limit). My best time on this level is around 20 or 30, knowing everything to do.

Agreed. Levels where you are against the clock can be very good and quite fulfilling. You should have a look at my TomP3 lvl 65 example. It's quite hard and very tight on the clock.