Yaaaaay, purple! My initial feeling from this is that the whole thing feels like it has the same colour saturation. Contrast the carp out of your next painting, Tim. You know how to use the levels and saturations in Photoshop, right? Did I mention I love the purple?
I think you need to remind me again that you like purple.Looking back at my last couple of paintings I can definitely see what you mean with the values and saturation, I'll be sure to pay closer attention to that for the future.