Well I got it on the 7th try. You just have to fool around with it... I should have written down what I did, but Im not that smart.
Try and make your moves symmetrical, like if you move one block on the left side, when you can, move the matching block on the opposite side the same way. That's all I can really tell you... other than: DON'T GIVE UP!!! That game is sweet, you must never give up!!!