How do I count how many restart layouts I have had since the game started?

As Farlander said use a global variable. Call it restarts or whatever you want.

You'll then need to save/load the variable every time the layout changes. You could do something like this:

Sorry for the image layout I did it on my phone not PC.

You can then check to see if the variable is saving by using the debug feature. It lists all variables, sprite positions etc. Very handy!

that is what I was trying to do actually. Can I see somewhere the status of the variable?

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If you mean to display a global variable, make a text object and use the set text action to the variable's name.

Saving to local storage is generally not necessary, as global variables do not reset when changing layouts by default.