Hi Ryan - sorry to hear you've had problems with it. I just had some friends try opening it to check it works on other windows devices that don't have Gamemaker, and the exe seems to work fine.
It creates a file called 'Made with Gamemaker' and there's a license agreement that pops up, so I can see why that's confusing - I should maybe put a warning about it in the installation info.
But just to be clear, it's not installing Gamemaker - it is just the game, and that popup is just the usual permission stuff, so it should just install and open the game.
I also thought I'd clicked 'no' on the pre-prepared code section, but it's showing up as 'yes' so I guess I was in a hurry. Hope that's helpful, and thanks for downloading it.