Very nice for the first time... love the background and nebula (what program/method you used to get this kind of nebula?)...
unfortunately it's very small... in future, don't make wallpapers so small because if you want to resize it to bigger res.. well, it's pointless...
I, for example, make my wallpapers in at least 5000 pixels wide and than at the end resize them at wanted size (like 1900px +)
Other thing is font... i find it too big and they lack of "epicness".. try to work a bit on fonts and effects.
Other than these two things, this is awesome... congrats mate, now bring us some more;)