To play you need Microsoft Excel. which you can get it through a Microsoft 365 subscription or you can buy the app for 135 or so dollars
So your saying, pay 135 dollars to play flappy bird?
Yes and no. You can pay for a Microsoft 365 subscription ($10 a month I think) or you can pay the 135 dollars
well, here's a crack tutorial I made that should help you
https://em-tec.github.io/post/massgrave/
Problem. That's illegal