OK, here is the capx. And just one question: can I change the order of the layouts in my game?
Wow, you seriously need to follow my advice and do some practice with examples.
More resources would be to open your C2 click new and scroll down that huge list of "GOLD"
Your capx is a great 1st attempt, but you need to learn how to do things properly else you are going to pull your hair out later on.
To answer you question - Yes you can and I presume you mean change order as to what is your first layout then yes you can, click on project file in right top panel and change project property settings first layout to whatever you want to load first.
This is basic stuff, covered in the manual.
Good luck, happy learning...