Hi Cody, I'm really sorry I have responded with so much delay.
You must create a numeric variable (we have called it Reset). This variable adds 1 value each time a letter is pressed. I have created an End layer, with a button that resets the course and in this case, it sends you to the slide.
In the base slide, there is a trigger that says to show the End layer, when the Reset variable is adjusted, if the variable is equal to a value (in the example I have set 2).
You should make the triggers of the missing letters (add) and decide what value you should have to show the layer.
I can send a .story with the solution... let me know