The game isn't very demanding and you could try out the Mac OS version. But on Windows it might not work on versions below Windows 10. But feel free to try out both versions and let me know if they work or not. If both don't work, you can still play the game on a web-browser by clicking on the "Run game" button above.
I'll give it a shot. Considering the era the Xenosaga trilogy and the original mobile phone version of Pied Piper released in, it feels appropriate to use 2000s era hardware and software. I'll be the guinea pig.
Update: The Windows version is x64, no dice for my XP setup(64 bit XP might work but that version of XP has more bugs and issues than 32 bit XP), and the Mac version isn't compatible with Yosemite. Good thing my main PC runs Windows 11, so I can try it out anyway.