General Sprite Experimentation (previously colour experimentation)

[Virtuaboy123]

The small pixels jutting out from the bottom sides of the helmet aren't really needed. They could easily be brought in.
As with what Previous said about the back of the helmet maybe have an opening at the bottom and show a neck going into the helmet.
Or because its a box shape the bottom could have a pointed edge. (hopefully you can picture what i said, i'm bad at explaining)