Looks great! I like the color choice.

I am no expert on design, but here is my input.

The first thing my eye goes to is your golem, and then it took me a few moments to find the "enter" button. Would it help a user to have the enter button somewhere near you golem since that is what draws your attention first?

Again, I am design stupid so bear that in mind.

Besides, I might need some Photoshop help from you here real soon...