Well, nice drawing, I admit.
You should look for some photoshop tutorials in order to make it more colorful - I saw some of your other art, but I
mean - you can do it faster :D
There are people that make excellent things in 2 hours, which would take ages for an unexperienced creator.
I recommend this site:
http://www.tutorialized.com/tutorials/Photoshop/1
If you train a little, you will be in the half way of becoming a real designer :D
Its a hard piece of cake. But you have a talent, I'm looking forward to see some brilliant art of yours.
See Ya around!