I think the coloring is perfect! I isn't that same tired comic coloring That I personal am used to seeing. I love the toned down colors on the characters and I way you made you coloring transitions. It have a cool geometric kind of look which I like to see in comic book art. I feel bold to me. I think you lines are clean and nicely varied overall. I would suggest the lines around the rocks in the background be a bit thinner in the future to help push the characters forward more and make their lines more dramatic. The just to me look a little bit too close in thickness to the ones around you forms. I love the pose they are in and how angry the Hulk looks and How mean Wolvie looks. You anatomy and personal style are very cool. This is unique looking. And I have to say this... The eyes look fine on the Hulk. If I were to suggest they didn't that would be my own personal preference. He just looks like he's in a rage to me, which I am pretty sure you were going for.