Since this is your first drawing, I have to say that this is pretty good tbh, just keep drawing and you'll get the hang of it, it does seem a tiny bit rushed for some reason, but I guess it's somewhat still acceptable.
Looks alright for a first drawing.
bad. looks misshapen and badly shaded and colored
First pixel drawing you mean ?
Ear needs to be fixed. Neck line isn't defined enough for the angle it's at. Folds on shirt are not realistic. Mask fits his face to well unless he used a most this doesn't make sense. Hat looks like it was placed on his head instead of actually being on it. I get the scratchy look that you were going for but it didn't turn out the best. You should try clean lines or at least clean up the scratches. Alright for first go but it could be easily improved on. I don't mind giving some further tips if you want it.
it could use some shading, but else it's a really cool style u've got going
I think it could be smoothed out.