Honestly I see nothing to correct, it looks nice honestly

First. If i watch your Works it remember me all the time of the Early Works from Shiro.

The big claw over him was not part of his body. it was a part of a ghost,Monster behind him?
His right arm look a little bit to long, his left arme look ok. And in my opinion his Thumb on the right Hand must be better goes a little bit back to his hand. A normal thumb is not longer then the first segment of the point finger.
And i think... if he walke the most time his legs look a little bit to weak, If he likes more to fly...His Legs are O.k. The door look realisic and good.
Sorry for my bad english, and i know i am not a good Artist but if you ask for a little help i will help.
Go on you are on a good Way.

His hand got turned around, that's why its like that, and he's limping due to the giant chunk out of his leg

O.k.

It looks awesome, and trywolf is right it definitely has the Shiro look/style. The only criticism I can think of is the thighs look a little like they were just placed there and not draw specifically just for this drawing. That probably makes no sense what so ever.

I guess, he's limping, he can't move his other foot.

nice scars

Ty.

np