This art style you seem to have adapted into is really interesting. It weirdly fits the retro pixel art aesthetic while at the same time having a cartoony vibe which I think combines really well since both of those are part of people's childhoods.
Also nam. Gotta love that gritty soldier aesthetic. But where is the ironic peace symbol on the helmet? The machete on the back for quick and easy decapitation? The napalm!?