(alert:"Beyond this point, things get serious. Grab a snack and buckle up.")
alert() function in purpose and ability. You
can use it to display a special message above the game itself. But, be aware that as the box uses
the player's operating system and browser's styling, it may clash visually with the design
of your story.
When the dialog is on-screen, the entire game is essentially “paused” - no further computations are performed until it is dismissed.