About the secret: It can be reached with only two skills;
in fact there are at least three different combinations of two skills that will get you to it or maybe not, I'm thinking of an older version of the level that had an extra skill that's no longer present, but there is still at least
one way to get to it with two skills.
Your solution to Dodgy 2 was pretty unique! I wouldn't call it a backroute, since it's similar in difficulty to the intended one, but it's definitely a unique route.
EDIT: I figure this post is the best one to put it in. xD The secret level is hidden in...
Rough 1.
Based on yours and DynaLem's comments about Timid 3, I've moved it's position in the full game to Timid 23 (was previously Timid 9).
By the way, to avoid too much backroutes and/or glitches etc, I'm probably going to want a couple of people to test it once it's complete but before release (in hindsight, I probably should've done this with LPII as well). If you're interested, let me know preferably via PM. No rush; it probably won't be ready for quite a while yet, especially with how difficult I'm aiming for Fierce to be. (As with LPII I'll release a second demo at some point; and that one will include some Fierce levels.)