I'm not going to reveal all my secrets just yet, but I wanted to share some things I've been working.
I have created quite a decent a path following SpriteModifier. It takes an array of points, and your sprite will follow smoothly along it, rotating if necessary. I made this because it's the biggest part of the game I'm working on.
And, as proof of how easy the engine is. I went from no game, to where I am now (working on nicer graphics, bug testing) in just over a day.
Keep checking for my game release, and remember, get all the engine source code yourself free!