Ok, just a couple things you can look at to improve. Try using a single backround, and practice blending your pic into that, rather than cutting and pasting to the front and back which creates the appearrance of a cut off cover, you want to use the overall canvas to show your art, right. Try making your back logo's uniform or the same size, just looks better. Add credits. Just a few things to work on, keep at it especially in W.I.P as that's where you'll learn, and the more persistant you are the more help you'll get. But above all Have Fun!!!!!!!
What you've got is a good start, as time goes on things'll smooth out!