I like the blur effect but a zoom-blur probably looks a bit better.
...and I agree with sivan, the game looks really dark.
Here's a graph which shows how much dark and bright colors are in a picture:
(taken from one of your screenshots)
x = brightness; y = amount of this brightness in the whole picture
you can clearly see that there are a lot of dark pixels but almost nothing above 50% brightness.
With this I don't want to say that you should make everything brighter but I think you could have
a better overall-balance between bright and dark colors.