Points to Ponder:
1) um...yea... its a bit pixelated in your attachment, consider doing your work in higher res next time.
2) The part where it sais ur name...yea...I like how you've made an attempt to make it look 3d, but there's your problem: the rest of your sig looks 2d, so it doesn't really blend well.
3) color...yea...interesting mix... I suggest reading up a bit on color theory...
You'd have to attach a higher res version for anyone to be able to give you any more advice... its frikkin too small...
not bad for a first try anyways...you'll get better with time, don't let 1 failure discourage you...