In this game you are fishing. There'll be fish swimming in the water. You can move your fishing rod horizontally with the mouse. When you find a good position you can throw the hook forward clicking the left mouse button and holding it until the power meter reaches the desired value. When the hook is in the water you can pull it back clicking and holding the left mouse button again. If a fish swallows the hook, you'll need to move your fishing rod left and right with the mouse to catch it. If you pull the hook all the way back, you can put a new worm on it.