Yeah mate, not the best of your tags A bit bright for my wee little eyes, and the left side seems plain with the green spatter I like the render and the effects around it but try to brighten it down a bit and also give it contrasting colours like your current -Zain
the left side is a tad bit better than the right side, mostly its your lighting that is screwed up. the right side should be darker while the light should not be coming from beneath the render rather to the left of it. try smudging out that mecha thing behind the guy on the left side too.