Interactively bypass/skip part of PowerShell script

I have a script that is made up of many steps. I want it to run from start to end most of the time.

Sometimes, I want to skip one of the steps. I'm looking for a "continue by default unless user presses a key" solution, like how Windows boots normally UNLESS you hit any key:

One way I thought of doing this would be by having a menu prompt the user each time to run the full script or just part of it, but this prevents the script from going any further until the user makes a choice. Any suggestions?