The mod for the game is called Better Iris, and it can be downloaded for free on the official website. It is a simple and easy-to-use tool that allows you to enjoy the game with more flexibility and options. 

To use it, you need to make some changes to the game. First, you need to install it, and then you can use it by creating an account on the website. You will need to enter your email address and create a password. After that, you will be able to enjoy the mod.