Thanks, is true is some difficult to animated but that's the beauty of working with a few pixels it gives you more freedom, and the challenge to make it look great and detailed the little details!

Well, well. This running looks quite smooth. I love teeny pixel art, and know just how difficult it is to create. You did great on it! ^_^

Thanks for the advice!  I corrected and is more smooth now a bit xd!

 This cycle isn't really working for me, her feet are sliding back and forth along the ground-the foot moving forwards should be raised at least a little. I could go deeper into critique but that would be the place to start.