All demos for this hard level show 25 moves. I tried it on Facebook, my Iphone, and tablet, and I am only allowed 12 moves. The bombs don't go off until 18 moves, which is another indication that 12 moves is not correct.
I read that everyone was set to the same number of moves, but I am still at 12. There is no way this can be beat with this number of moves. Please change it back to the 25 it should be.