Your image composition is excellent, and the simplicity of the 2-color style suits it perfectly. The only item for possible improvement that stands out to me is the jagged bit on the right side of his hairline, which I feel could be smoothed somewhat - unless you were trying to convey an angle there, in which case it's fine as it is. One way or the other, though, this is a solid piece of work.
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Your image composition is excellent, and the simplicity of the 2-color style suits it perfectly. The only item for possible improvement that stands out to me is the jagged bit on the right side of his hairline, which I feel could be smoothed somewhat - unless you were trying to convey an angle there, in which case it's fine as it is. One way or the other, though, this is a solid piece of work.