Further more it is completely unusable on some touch devices, I tried iPad 4 and iPhone 5. They both scroll the page (better: bump to the top, as if you wanted

Further more it is completely unusable on some touch devices, I tried iPad 4 and iPhone 5. They both scroll the page (better: bump to the top, as if you wanted to scroll past the end of a page) instead of moving the blocks. :-/