would be better if it didnt have huge "PREVIEW" marks all over it (i know they are watermarks but you could lower the opacity).

Anyway, it's too simple for my liking, not much going on, to be honest its a bit boring to look at.

Maybe try a bit of a gradient or something, not a huge gradient but on the top two boxes with blue try that blue with a slightly lighter or darker blue, and see how that turns out, but that's all i can think of for improvements.