In the future you need to save your project as single file (capx) and share just the capx file, not the entire folder.
I modified your "autosave" file, so it might not be the latest version of your game:
https://www.dropbox.com/s/fsndp78ierdqo ... .capx?dl=0
You should spawn new towers from "TowerDisplay" object, not from Tower1.
I also removed all off-screen objects and moved them to an unused layout. This way they will not interfere with your game.
When you add new objects, place them onto that Assets layout.