The skull has probably been resized from a higher size, as the borders are a little blurred (you should've sharpened it a little and yes, i'm watching at the full size version, not the mpgh resized one), while the left side of the smoke looks weird, probably because at times it seems it's copy/pasted next to the original location (just look next to the eye, on the left... or next to the mask).
As for the text, selecting the text's area and applying a gaussian blur is (almost) always guaranteed to be a bad effect, the font's u,m and n letters are IMO very ugly.
One big issue is that the logo can't be placed anywhere as the smoke is present on the top side of the image too, thus requiring further editing, putting it in particuliar places or keeping an ugly effect otherwise.
Plus, why would you want text ON the logo? (Assuming the logo itself isn't just a random internet image but has a meaning to whoever uses it)