a block-coloured one frame gif? you sure you uploaded the right image?
and yeah, I do have some crits.
First I just wanna clarify I don't mean that you should just completely follow the edit I made, you're free to go in any direction you want.
but it seems you've bee slowly adding 'dots' of detail allover Maddox's sprite, it doesn't really make any sense given the lightsource, unless he's ridiculously sweaty or covered in gliter.
Sweaty, sure I can understand, but glittery?
glittery, his next article would be about you

I think given the detail you're adding, you might want to change the lightsource so it fits in better, also with the extreme sun on back lightsource, sprite flipping would be pretty bad..
and I also think you should keep him at the same angle for his walk cycle, it's better that way for many reasons, all animations read a lot better when the limbs aren't immediately behind each other, and making him change direction usually doesn't even need a tween frame