For making in 5 hours, very nice job. Definitely seems more mobile-friendly. I think if you wanted to do something more hardcore, less tap-to-win and more thinking puzzles so to speak…perhaps you can play around with boundaries and allowing the player to traverse the map outside of the squares. Then Arrow block could maybe have a number on it like how many blocks it will spawn in a row, and maybe the player has to exit at a certain block position.