I'm a noob myself so take my advice with a grain of salt.
You definitely have a certain style, which I like.
the eyes look rather crazed to me, a wide open stare. and maybe it's style, but the outline of the face seems too thick, either use more thick outlines to establish the theme or make the face outlines thinner.
second guy from the right, is the dark maroon color on his forehead shading from the hair or a headband? If it's shading I think you have too much