The bagground looks to me a bit too simple... but if you add some more colours or some other effect i think it would be pretty good... hmm i also think that ur render could use some effect in his head it look like some of it are black and white and some are orange and that seems a bit odd... The last thing i have noticed is that ur font realy need to be changed it look like stock font and we dont like stock font
Download some on
www.dafont.com or something like that
All for now hope u can use some of my advices...
Go for it ! :d