A few things about your walk cycle. Right now, you've got a bit of a horse-like clop gait going on. This is partially due to the way your feet stay more-or-less static throughout - the bottom of the foot never bends. When you walk, the bottom of your foot doesn't stay so flat. The bigger issue is that you have the leg that's striding forward bending WAY too much. Try walking like that yourself. You'll find it feels very unnatural. Typically, the back foot that stays in contact with the ground pushes forward. The leg striding forward bends very little. Additionally, the arms are bending way too much when they swing backwards. Typically, arms bend more on the *forward* swing. Try just walking across the room paying attention to these things and you'll really be able to feel them. Walk normally, then walk like your character, then walk normally again. Finally, there's very little differentiation between the front and back legs. They sort of melt together.
A comment on the character art. Right now, it's sort of messy. Try cleaning up your colour palette and eliminating noise. Focus on making every pixel and colour having a meaning.
Here are a few small edits to your walk cycle. I didn't do a whole lot, not everything I talked about above, but I changed a couple of smaller and quicker things about to make it a little smoother. I also entirely eliminated two frames, the ones with the most leg bend.
Also, this forum automatically zooms in on images when you click them, so there's no need to resize before posting. You can just say they're meant to be viewed at 4x.
