Add mark for a quiz game

Once time,I want to make a quiz game but when I was making the mark system, I found out a problem. That problem is no matter I answer correctly or wrong, it won't add the mark.And this photo is all my coding.

There's a price to be paid when you use multiple screens.

When you switch screens everything is erased and reset, including variables and screen content.

You have to keep all the data in TinyDB and are doomed to using it for everything, like a hobo living out of a suitcase.

For a small app like this, it's easier to stay in Screen1..