Jazz.'s thingy of things

Made this one about a week ago
http://fc08.deviantart.net/fs71/f/20...67-d6gtorl.png
Made this one yesterday, I think I can see an improvement in quality.
http://fc02.deviantart.net/fs71/f/20...67-d6gtp53.png

I am hoping to do more tags and sigs in the future rather than wallpapers
Please comment and give constructive criticism

First one is cool. your contrast is way too harsh in both of them, and some areas that get your attention right away are pretty lq.

second one looks beast, loving all the effects