Please Help! Multiple text-entries on slide - posted sample

I need learners to complete each text-entry field (on the same slide) before continuing onto the next slide - problem is, I'm not sure how to set the variable to ensure each field has text in it before moving onto the next slide. I created a variable that mimics how one would enter text into multiple fields (click inside the text field, enter your text, and hit enter to move to the next text entry field). How this presents itself currently, they only need to click inside the text field (which I guess validates my variable) then press return (without entering text) and they are still able to move onto the next text-entry field and not required to input any text. I am at a loss! Con someone help me figure this out? Thank you!