Hi there,

After several moves from Microsoft, if you download the game from Windows Store, you will need to upgrade your windows to Windows 10.

That includes all windows devices: pc and windows phones.

Microsoft is not updating Windows Phones 8.1 any more and they are very old devices with lot of problems (without fixes). So I can't continue supporting them. Microsoft also moved heavily into creating a unified platform with Windows 10, which runs on all devices.

In short:
- If you have a pc with Windows 8.x, upgrade to Windows 10. It's so much better. If you can't upgrade to Windows 10 for whatever reason, you should get the game from Steam at store.steampowered.com/app/480500 which runs on Windows 7 and higher.

- if you have a Windows phone 8.x, upgrade it to Windows 10. If not possible, unfortunately you are out of luck unless Microsoft allows to upgrade that phone.