Hello and thank you for your reply 
This is what it looks like in-game:
On the top there are two packs of LVLs (pink, green).
You click one, it gives you a different list of levels to play.
The buttons I am talking about are the LVL buttons - in this case the pink ones:
Tutorial 1, Tutorial 2, etc.
When I click this LVL button, Play Selected Level changes to Play Tutorial 1, for example.
In the right of the picture, There is text saying Text Block.
This text will show the best time of a completed level stored in the Map variable.
Now, I am trying to call an update of the Text Block every time I click (select) a different level button. As mentioned before - each button click should trigger this action of updating the Best time text (because the level changes, so the text should change).
BTW: So far i created Event Timer and I run it every 0,1 sec and It works ok… But would be great for other use cases to have some code, that triggers every time any button is pressed.
Thank you for your reply again.