Despite being a simple association game between an image and the video of a sign to practice LSM, it has robust algorithms to provide you with:

-load a small group of elements on which you will focus
-a gradual supply of signs
-registration of the appearances of each of the elements in order to keep the flow of elements equitable
-All the elements gathered in a single category, placing each element with the same priority

If you get to play this game you may not even realize everything that is behind it. I just want you to know that, perhaps, you are one click away from having a tool that will help you familiarize yourself with some signs in the learning process of LSM.