Hey there, just 2 little pennies I might add (cause I encountered them during the lecture 
) :
If you happen, like me, to have Unity version 2020+, you should change the branch before downloading 2D-extra ! Otherwise you’ll have an error in your console, and Tile Rule might not work properly ! (To do so, simply click on “master”, then select the closest version from yours)
You can add randomness to Tile Rule 
! If you have, let’s say 2 different sprites for the inner ones, you can add diversity to your platform by setting the output to “random”, and add the second sprite to the list (you can also add random rotations) ! And that is really cool 
