I think it's time that I critique your works To start off I really like the idea of the layout: Having a happy Jess upside down with her long hair in Gumball's face. His annoyed expression is funny as well X3 But it shows that whatever the situation is, Jess will always be there :3 The colouring and shadings are done good for the most part, particularly on Jess's hair, it blends in just right. However, it seems to wash out on Gumball. It makes it too light and too dark in some areas. It seems you used black and white instead of different tones of the colour for shading? The latter is more effective, saying from experience. Over all it's a cute drawing for a cover and it suits it well :3 Ottimo lavoro!