Oh, one last quick comment about your main menu: I think you did a solid job with the character pose, colors, and details, but consider giving your lighting/shading a little more love! Some details such as the shoulderpad and body armor come across as a little flat because of it. I think it could go a long ways in really improving the appeal of your design!
https://saint11.org/blog/pixel-art-tutorials/ As a general reference for learning more pixel art design concepts, I always highly recommend the tutorials of the wonderful Pedro Medeiros.
Best of luck and keep at it!