Quack Mafia and Gizmo Gravity games have changed.
Whenever you send score, the coins you have earned and upgrades you have unlocked are saved to your account.
Your coin balance will never expire but all upgrades reset on the 1st and 15th day of each month.
For some odd reason Gizmo Gravity doesn't work for me. :/ The loading bar goes ALMOST all the way to the end (with perhaps a millimeter left), and is just stuck there, and I cannot start the game. All other games work fine.