Fufps Ok, I tool a look into the titlepage.fpi & setuplevel.fpi commands.
You can skip the main titlepage but you have to do this after a final build.
After final build open your "titlepage.fpi" and delete everything and replace it with just this simple line of code..
Now how to fully "exit" a game is tricky, as when a player exits the "in-game" play it takes you back to the Titlepage
and that would reload the game again. So you now have to open the "setuplevel.fpi" Scroll down to the Game Menu section and find this line of code
:state=4,hudselectionmade=5:continuegame,destroy
Replace that line with this...
:state=4,hudselectionmade=5:quitgame,destroy
Now your game will fully exit. Back up any files you change in case of problems when making these kind of changes.
Also, next time, this is more of a scripting question and belongs in the script forum

Let me know how it works out for you.
best,
My games never have bugs. They just develop random features..
Lots and lots of random features...