I think the style looks pretty good and its unique... the only thing is that animation will be a huge pain because they're so big, and won't be possible at all in MS Paint. If you're planning on animating these, there are several free programs you can use, such as GraphicsGale and GIMP. Personally I can't be arsed to learn GIMP because GraphicsGale is way simpler, but these are probably hi-res to use in GraphicsGale with any manner of efficiency.