Perfect!
A perfect piece of work I say. All the animation was smooth, all the drawings were high quality, all the programing was well done, the music was excellent (always), the story continued nicely, and the puzzles were original but yet have the good and old adventure touch.
We could even control one slug and see it's origin. And the number of times needed to replay the game in order to get all the medals was enough to get all the fun from, but without getting boring.
The only thing I could say to make this game better is that the walking cycle of the characters needs more frames, but this cycle isn't bad at all! And if isn't broken, don't fix; so forget all this paragraph.
As I said, it's perfect. Zeebarf, you must bee really proud of yourself. Good luck with your future games, I'll be waiting. (and I hope you get the review crew pick)