Not bad you got the anatomy of the main body pretty good but you need to work on the anatomy of the wings a bit since they look like they could put up a good strength wind but aren't quite giving the idea that they are strong enough for flight or maneuvering.
Though they are close it's more their outer area's span isn't quite big enough and they're a bit flimsy for even moving around faster and or increased agility let alone flight or gliding since even the wings used for gliding on an Ass-Blaster from Tremors 3 has the strength to withstand take off and any exertion their owner can put them through.
Which basicly means a bit bigger around the tips and more reinforcement around the centre and you'll be good since then he can furl them up and unfurl them when he needs them making them better balanced without unnecessary bulk.
Oh and for those interested in Ass-blaster's and the relevence of the refference follow the link below it leads to a wiki on the creatures from Tremors 3 specificly the one on the Ass-Blaster's which I'd have prefered to get a link to on Wikipedia but no one created one on them on there which is a pain.
http://tremors.wikia.com/wiki/Ass_Blaster