Hahaha, I totally need to start paying you or something. I'll admit that is involved. It's kind of based off of the idea of making a game rather than a level pack... in many games, though Sonic comes to mind, there are certain unique gimmicks involved in each environment, so if I figure out which particular events and themes I want a level to have ahead of time, I know a great deal of how the level will work and what I can include. So Shade Castle had bridges, spike platforms, poles and horizontal springs, and some other things with less prominence. And all this is good, I think, because a level design based partially on events rather than just masking, is going to be more interesting, and the repetition of certain themed events gives more of a feel to the level.