Reset score box

Hello everyone,

I have used the script for adding score to a game from the advanced tutorials section and it works fine. The only problems I still have with it are:

1- it discounts 100 points every time the users click on the same wrong button. I would like the button to work only once since this is for an educational game.

2- when I go back to the first frame, the latest score is already there. How can I erase the score or set it to “0” when the scene is reloaded?

Appreciate your help.

Sawy