Hi Carlo. I like the simplicity of the comp, the shallow DOF works well here, and the diagonal of the mushroom stem is a plus. If this was mine, I'd be tempted to remove the four little dark spots from the mushroom head. This is very well done!
Very nice, Carlo! I might consider cleaning up the little darker line at the top of the stem on the right but the rest of this image is beautiful! Well done and well composed!