Made an edit. A really sloppy one. I added another color, hope it didn't ruin the image.
DO NOT BLOW UP THE IMAGE!!!
First of all I would advice against using the standard mspaint colors. His head was too wide, I reduced it a little, but I think it's still too big. I also cleaned the lines up a bit. His stance was really awkward, everything was from different perspective, like those egyptian paintings or a picasso painting. Also the buttons on the stomach were in a straight line, I tried to make some depth, but it will be really hard to place them good without subpixeling. You should look at tutorials and use references.
Anyways, Good luck.