I really quite like this little guy. The animations are nice, too, very smooth and fluid.
I'd maybe make his chest expand a bit in the breathing animation, just to give it a little more life. In the walk, the arms don't swing enough, and, now that I look at it, they move backwards, too. When the right leg is foreward, the right arm is, too, when it should be the left arm that is foreward with the right leg (if that makes any sense). Also, A head bob would add to the animation greatly, and right now the upper body looks pretty stiff. legs look fantastic though. Nice stuff.
Jump looks good, but maybe he should bend his knees a bit pre-leap? Otherwise, no crits here...
Finally, his head juts a bit too far foreward, methinks. Makes him look like he's slouching uncomfortably. Maybe move it back a couple pixels, and see how it goes.
Quite a few crits, I know, but these are honestly looking great. I really dig the palette for it's boldness, if nothing else (orange seems pretty under-represented nowadays...), and as I said, the smoothness and fluidity (especially in the legs) is sweet. Keep it up!
