Its quite nice, however maybe a little too simple? I know simplicity is key but i think it needs a little something.
Can you change the background circle to a color such as pale fading blue? I think it would make it look a little more interesting. Also maybe a different font, take a look on dafont.com/en/ for some great free fonts.
Well it is decent but it just looks like a picture of a horse with a basic gradient and text. I would actually design the horse in Photoshop or Illistrator. I would hire someone on NP to do it.