i'll be blunt. colors dont match well. its enourmously overcontrasted. waay too busy for my liking. go easy on adjustment layers, they have a tendency to screw with your contrast if you're not careful. try and simplify your work in sprites. negative space is a powerful tool when used well. you want to attract people's attention to the sprite, not hit them with a wave of color.
blends in too much with the background try to make the bg less busy and im sure ittle look fine just kinda give it better flow and make it lessssssssssssssssssssssssssssssssss ummmmmm bussyyy there we goo
Everything entropy applies is true. Sprites are an art in themselves, you have to make the sprite look alive, feel alive, and literally be alive. Your sprite sig is too crowded, way to contrasted, and way way way to colorful. When making sprite sigs, you have to focus on one thing and one motion/emotion. Let that emotion be filled out within the sig. An example of the motion that your sprite is doing can be done like this. thats one of my sprites from a long time ago(im not trying to show you up, just giving examples of ways to make sprites look like they are actually doing something ) here are some more of my sprites whether they are good or not is for you to decide. You just gotta think of the ways to make the sprite look alive. Dont feel bad tho, here is my first sprite sig.