New ref

[Tuna Unleashed]

The upper body I edited (for obvious reasons) but the legs were redrawn.
Edit:

[Atnas]

Hey! Heel-strike! The new edit is better but let those legs extend all the way and bring the heel CRASHING DOWN.

[Tuna Unleashed]

But anyway, jump time

[Dr D]

The walk still looks quite a bit shorter and smaller than the idle, to me.

[Tuna Unleashed]

Its one pixel shorter in the highest part, which is to compensate for bent knees.
Edit: Heavily inspired by Ben2theedge's stuff

[Mathias]

The walk anim seems too fast. Wow, the jump animation is great. I think you nailed it. Looks like he's jumping down to a lower platform.

[Tuna Unleashed]

It really sped up the walk when uploaded it. Is this better?

[Helm]

He's still shorter than the idle sprite and his legs deform as per the noodlearms/noodlelegs critique you recieved some time ago. You're treating arms as some sort of tube that can morph in whatever you think they should and although stylistically that might be fire it's not when you're lacking fundamental knowledge of how to draw the body and how motor function works. You're at that uneasy sub-space where you're trying to model not exactly reality but not exactly something invented in your brain and you're acheiving neither.

[Tuna Unleashed]

I think I fixed the legs but with the arms I'm not sure if you mean in general or the movement.

[32]

His arm kind of looks like its pulsing as he walks, no idea what you intended but there's a bump runs down from his shoulder to his hand. His jacket and chest move way to far to his right at one point and it looks like his leaning over, along with the fact that it doesn't turn to the left on the other end of the animation adds to that effect. On the jump animation, if you rotated the stripe of light closest to his body on his right sleeve it would make it look more like his shoulder is rotating and help eliminate the noodle arm, his elbow is to far down the arm also.

I think helm means that you just to bend the arm at any point and not at the elbow/wrist, very noticeable in the jumping animation.

maybe get rid of the outline under his shoes, they seem to be a bit thick.