[Illustrator]Homestuck Fanart Poster - Vriska

This is a poster I made for a class some weeks ago. I think my teacher really liked it, but I didn't get much more feedback than "I liked the colours", so I'm hoping for a little more here, I suppose.
[I put it in a spoiler due to it being quite large.]
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Full size
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Made with Adobe Illustrator CS6.
Any thoughts? :]