I'm not much of a fan of Abstract but I can still criticize this.
Anyway, there was a post about complementary colours, so if you search that out youll find that red and green rarely work well together. Seeing as Red is a warm colour and Green would be a Cold one. My suggestion for colours is use a green/blue instead of the red.
White background doesnt fit this wallpaper, I dont feel a black one would either - however, a dark green would do well here.
The text... well, the -font- isnt a nice font. To put it simply. Sometimes it can work with more "gangsta style" peices but I dont get that from this wallpaper. Since I dont go searching around Dafont all the time I cant suggest which would look best but I can see a San Serif font being used here.