Colorfull
The whole mushroom idea was pretty nifty, very interesting, i like the colors kinda like mario brothers, but you gave it a unique face and trunk look, and the backrounds were ok, but seems like you could have gone with something else there, and some more "TEXTURE" could have been on the trunk and mushroom head itself, just a few ideas there would be nice, other then that this was simple but still a nice piece here, anyways good luck on anything new you may be working on.
~~THINGS TO IMPROVE ON~~
So first of all its a nice peicem nice use of color, could use more texture on the mushroom head, and maybe a differant design in the backround.