thanks a lot for your help!
I understand the process, but i don't know how to set up the lines.
- What difference between 'start new game actions' and 'game launch actions"?
is it in the game properties action > At begin, start the following actions?
and the other one is for the left click on the launch game button i created?
- and 'call new game actions' : is this a script you are calling?
What i tried:
- Create an action which can be called by another one
I set it up with what you mentioned in 'start new game actions'
- modify my left click action on my launch game button
I set it up with what you mentioned in 'game launch actions'
I must be wrong, because nothing happens. The launch button is not launching any more

edit: i built the game, tried again, but nothing.