This is what i get when i click the link
Open Google Play Store on your Android phone
Tap your profile icon (top right corner)
Tap "Payments & subscriptions"
Tap "Redeem code"
Enter your code: 92FQX3D0VGWY67XRENPEAZC
Confirm — Silicon Empire will appear in your library, tap Install
That's it. You'll receive all future updates automatically through Google Play.