Once you complete the daily usage for a game it will have a check mark on it indicating the usage completion for that particular day. Also, if you notice the checkmark on any apps not being removed past 24hours then it means the usage days for the game is ended. Each app that you install will have a set number of days within which you will receive points for using the game on daily basis.
Once the usage days end you will stop receiving the points and the games will have a checkmark on them. However, you are still eligible for goals/purchase bonuses on those apps.