Welcome to C2, glad you're enjoying it so far!
I just took a look at your capx, and you are using local variables for score, health etc. It would be better to use global variable, as these can be used anywhere even across different layouts.
To add a global variable just right click on the event sheet, then scroll down to 'add global variable'. And don't forget to change your code, so that you're adding score, health etc, to your new global variables.
Hope that helps :)