These are great. good character, awesome color choice, and pretty fluid animations. The head looked like a liquid to me when i first saw it, like green stuff in a container. Graphics gale is awesome, i thought the same at first but i spent time with it and i came to love it. Bought the full, actually.Theres some tweaking that could be done, but first let me animate your walk for you.
There he is. Its an interesting idea, i may have to try that approach, but tackle it again with some method. Get 'the animators survival kit' by Richard Williams from the library, priceless walk animation information there. I love your guy, but do some studying on walks and do a walk before doing a run. These things are the hardest to animate, so don't feel bad. My first run was atrocious.
For the idle, there should be an inbetween between the down and up, so it looks natural. Arms are a little awkward, might want to adjust a little. Lots of animators fear covering up their character with limbs and such, but dont be afraid.
One more thing on the walk and i'll leave you alone, i promise. When the arms cross on the second step, either have them cross again on the first or leave them the way they are on the first and make it the same way on the second.
I have to go for now, but is everything clear?
Adios, amigo!
~Shrike