Help with the variables used

Hi.. I saw this very great demo online : http://elearningdesigner.com/portfolio/trivia-time-game-template/

I was trying to get the idea of how the author did the variables but no luck for me. Can anyone help me with this? What variables should I do to create the score that appeared in it and the state of the character each time a learner gets a correct or wrong answer... I mean I was able to do the add reference for the score but it the character state is being affected whenever I do some triggers.... Thanks in advance!

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