You should amp up the contrast between the white and gray, even though it's not the final color scheme, you'll want to see what impact the lines have on the whole readability of the sprite. The line that marks his armpits is almost invisible.
The side view maybe needs a bit more curvature or detail (like maybe the sleeve protruding slightly) on the left side. Right now it's just a straight line in the torso/shoulder area, which is kind of the opposite of every other part, even in the other views. Just looks a bit jarring as is, plus it will make the silhouette more interesting.
The right part of the side view is also a bit off. Either shave off a pixel on his belly, so only his pecks portrude or some other solution. Right now it's a just a patch of orange where his sleeve ends and that looks like a mistake more than choice.
Good luck and add those details and color you plan so we see how it turns out.
The side view maybe needs a bit more curvature or detail (like maybe the sleeve protruding slightly) on the left side. Right now it's just a straight line in the torso/shoulder area, which is kind of the opposite of every other part, even in the other views. Just looks a bit jarring as is, plus it will make the silhouette more interesting.
The right part of the side view is also a bit off. Either shave off a pixel on his belly, so only his pecks portrude or some other solution. Right now it's a just a patch of orange where his sleeve ends and that looks like a mistake more than choice.
Good luck and add those details and color you plan so we see how it turns out.
