I don't know if its just me, but I cant open the game itself. I don't have any button to launch the game. If I could get a bit of help figuring out how to start the game that would be much appreciated.
If you are using the Itch.io app, it will be in your library and will have a large "Launch" button on the lower right.
If you downloaded it directly without the app, you will need to open the compressed file and put it somewhere on your computer, then click Archipelagates.exe