Hey welcome!  I like the simple sort of minecraft style.  Not to be mean, but you might want to add some dithering to it.  This tutorial here really helped me (even though I haven't put it to use yet!)

http://kitted.deviantart.com/art/DITHERING-TUTORIAL-Basics-69747353

I've just started doing pixel art myself last week so by no means am I an expert.  Just trying to share what I've seen.

Take care!

-willing