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The scarf is good; the hair, belt, mouth, and eyes are pretty good; the eyepatch could be a bit better, and it's hard to see details on the patch part in particular.
The head shape and neck need work; I think it's making him look kinda chubby. The eye to our left seems smaller than the one to the right, but the angle should make that the other way around. The line you put on the inner side of the eye on the right seems out of place... I think it'd look better without that line.
The shoulder with the shoulder pad is like... not connected to his body. The shoulder pad looks very close to his body, but with a round shape like that, it should look more like it's resting on his shoulder and bumping out more. The belt seems a little bit too 2D, as in it doesn't quite look like it's wrapped around his body. His shirt sleeve is tighter than his arm, which doesn't make sense.
The hands look cartoony, but the general shape on the hand to the right looks good.
His legs lack any depth, and they're different widths (with the farther one being wider). Rather than bringing his legs up until they meet and form a sharp angle, you should make a small horizontal line at his crotch (maybe in line with the pouch on his belt to the left).

When extended, the arms should reach to around the middle of his thighs. The arm on the right might be able to, but the arm to the left certainly isn't making it.