-.- you DOn't Need a Script for that...just make a Copy of the Same Game, delete all the Maps, Events and Switches (Don't delete the Ones your planning to use in the 2nd Game thou)
Don't change anything in the database...And Make sure when the Game ends, to ask the Player to Save the Game, leave it in a Map that Youy WILL Re-Use in the 2nd Game. In the 2nd one, you just need to make it so the character teleports to the New Map.
All the Player needs is his Save file of the 1st Game and adds to the folder of the 2nd Game...that's all. =/