You just have to extract the files from the zip archive (I recommend the desktop). Then you just open the folder and open arena.exe.
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Also you should add more cards because after a while it gets kind of boring and after while you also have so much money and political power that you can just swipe left the whole time but the feature that you lose so much political power after a certain year balances that factor out. It's really fun and challenging.
(I don't have any ideas for more cards so i can't suggest any.)