Press Any Key Trigger

Never underestimate the ingenuity of users to bypass our best attempts to train them. While we can lead them along the path to enlightenment, they must follow it on their own.

That being said, use these conditions for the Jump to next slide trigger on the Submit button:

Jump to next slide when the user clicks the submit button
IF:
Variable Text Box is not equal to blank
AND Variable Text Box 1 is not equal to blank
AND Variable Text Box 2 is not equal to blank
AND Variable Text Box is not equal to space
AND Variable Text Box 1 is not equal to space
AND Variable Text Box 2 is not equal to space
ELSE
Show Layer 1 

Then I added this trigger and show a second layer:

Show Layer 2 when the user clicks the Submit button
IF:
Variable Text Box is not equal to space
AND Variable Text Box 1 is not equal to space
AND Variable Text Box 2 is not equal to space

Then I added another trigger to reset each text box variable to blank:

Adjust variable Text box = blank when the learner clicks the Submit button
IF:
Text box = space

(Repeat it for each text box variable. This resets the text box to its initial state)

The word space in the conditions above need to be replaced in the condition by typing the space bar 1 time. See attached.

You can continue to add conditions until you have completely exhausted all possibilities to skip the activity, or just hope that your learners, for the most part, will participate in their training.