You have to use the arrow key to move, and don't touch the obstacles. And here some advice, when you are about to get the crystal on the underwater level, do it slowly because there are a lot of obstacles on level 5.
If you like it give a star and a heart. If you want to see more of my games, type, GemBakhshi in the search bar, tell me what you think of them. Check out moosenoodle's remix.