0xffff: 1248 Math Block Puzzle

You don’t have to be a math genius to love this gorgeous puzzler.The more time spending on Shift A Bit! - 0xffff, the experience just gets much more fascinating - and incredibly fun to pass your time.

The formula may be straightforward, merge numbers to create bigger numbers and try to reach the biggest number 2^16.

But only 1/1000 can do that, may be you're that person?