I like the way you shaded this, it really sells the action figure vibe. The left arm and hand look to be considerably larger and longer than the right though, that should be flipped because the right is closer to us. the white outline around the character is a good way to make a character without a background pop however the splat marks in the background are the same color as the outline so it just looks really busy and distracts from the character. You should either get rid of them entirely since the character design looks to be strong enough to stand on his own, or dull the color of the splats; maybe a darker olive shade to match with the character.
Good work, hope that helped in some capacity.