Really awesome concept! Some of the Orange is a little rough. Even the dithering is a little rough, but it's only 3 colors! I think it's going to happen with such a contrast between colors. I don't know if it's "correct", but I like it and you used the palette the way I would've tried to do. I'd like to do the round canvas sometime though, I wouldn't have thought of that. Great job! Keep up the great work!
Cool dude.