I'm pretty sure this one's my fault...

I never thought to test the restart feature from a saved game.

Yeah. It doesn't restart the game from the beginning (as I would expect from a restart command, and I think most players would, too); it restarts from the save point.

This isn't all bad, I guess. As long as the player expects it to restart from the save point.

...but how the heck can we restart the entire game from within a saved game?

EDIT

Using some of the UNDO functionality maybe?