would it hurt to add just 2 more colors. the motion blur would look much better if seperated by the ocean backdrop. also i think a more calm ocean would better contrast from the fast motions of mugen and gene.
the style you created with those 2 characters is hilarious, in a good way. like an rpg sprite with personality... now that i think about it, it looks like you used stovens tutorials to use here, with the rpg spprites and the stars.