Hey Otto, how will this work. I imagine it as...
On the main menu above tutorial you have the "adventure" button, when clicked it will start a game then automatically load the adventure mode save and make the correct minigame. Each level would have a different save. You could also make it so you need to build in some areas to continue(like a high wall in your way.) The mod would also include all of the required addons in it, so no matter what addons you have. You'll always have the required addons in adventure mode.