Start your free trial by clicking on the button, then using your mouse to move the mouth to eat the swans. When you reach 200, you can start your membership, where you move your mouse to move the mouth around to the swans whenever they appear.
First of all, please be informed that this is a joke. In no way am I actually trying to encourage someone to eat a swan, and though it is legal in some places, in many others it is illegal. This is just a personal joke. Please do not go eating swans illegally because of this project.