This game is awesome. The puzzles of unblocking the boat are excellent. I played it and finished all the levels. It's challenging and exciting. I wish there would be some more levels! This app is free. Here's the links
https://itunes.apple.com/us/app/unblock-my-boat/id761223888?mt=8 (ios)
https://play.google.com/store/apps/details?id=air.couk.hamzagames.unblockmyboat&hl=en (android)
