Regarding the Emerald Forest:
I think it would look better if you varied the leaves, i.e. make it so the boarders aren't square. It looks a tad unnatural the way it is.
Also for the black part below the ground, make sure the brownish texture doesn't just end like it does now; put a few roots and things there to eliminate the straight, abrupt lines.
Agama's tilesets are so gorgeous but terribly hard to use... I tried making a level with that tileset (swamps of the sleeping jaguar) but I failed miserably. There is too much eyecandy! (Is that even possible?) I'm too much of a perfectionist and I couldn't get the leaves right.

Regarding Jazz Jackrabbit 2 - The Movie:
Tutorial and Scene 2 are looking good, but this is what I have to say about scene 5: The background is very blue. If it is a long level, I think it might end up hurting people's eyes simply because it is a very bright color. You are using Top Secret ]|[ tileset, right? If you are, there are plenty of opportunities for floor eyecandy; don’t only use the squares. It leads to a very boring floor. Just a few tile changes can make a big difference. I suggest you look at devres17, located in EvilMike’s pack “The Resurrection of Evil.” It is a wonderful, wonderful, example of everything you can do with that tileset.