Oh how considerate of you to add the skulls just for me! haha. I'm glad your pushing your boundaries, I'm sure you're leaning how hard color can be to work with, especially considering the ambition of your lighting! Be wary when painting in your colors of using black - black is not a natural color. A shadow on or inside a yellow or blue object is not black, it is a darker shade of yellow or blue, and to paint black over top in many cases, is jarring to the natural feel of the colors. Your piece holds its own fairly well in terms of its composition - the balance of where the viewers eye is drawn and how the piece is laid out is neat and compliments the image and style. The painting style you have going on here lacks solidity, the edges are somewhat unrefined, but inside and on the outer edges of the shapes/characters. Don't be afraid to have some hard edges and contrast where they're needed. Overall you're doing really well! Keep up the effort, and thanks for sharing your work with me!