bg:
too simple atm, and the effect you've used makes it look low quality.. it lacks depth and it is very boring.. colors you've used are good though, they match the render colors..
experiment with gradients, brushes, stocks, textures++, and keep working till you get a simple and clean bg that is interesting or eye catching

if you keep it smooth, it makes the wall comfortable too look at
render:
the main part of the render looks good, it is smooth and the colors are good, it's good on the eye

the effects used are not the best though, the splatter or smudge thing is too sharp and too defined, and the motion blur look isn't very good.. keep practicing and keep the effects simple (as you have

)
text:
low opacity text in the bg is ok but i don't like the wave look..
you can easily make the main text look a lot better if you spend just a little more time working on it, you don't have to do much to make it interesting or eye catching

change font, change the colors of it so that they match the bg colors and the render colors better and remove (or tone down and blur) the shadow effect..
glad to help
