Indeed those wings came out pretty nicely!
You mentioned in your description a bit about proportions, so I'm here to just lend out my 2 cents :P
Firstly, the human head is 1/7 of the total body height. The navel is about half way from head to toes- so I think this could help solve the height problem atm (I think his torso ended prematurely :))
The next thing is the arm- the arm span is about the same as the height- so one arm would be about 3 times the height of the head.
The face consists of 4 equal parts like layers on a cake. The first line you draw (indicating the first quarter) is where the eyes lie, the next the nose, and the next the mouth- so the mouth is a tad bit low- but it's nothing to worry about :)
Most of this was based on the Vitruvian man though (minus the face part :P), who is way too perfect for his own good X-P Hope to see more drawings ^^ I'm sure you'll improve- not that you need much of it-! Your drawing is very good ^_^b