In this game the objective is to flip the pannels so that the total value of the panels you flip equals the target value. This is easy in the first round but everytime you use a number you are forbidden from using it again for the rest of the game.
Singleplayer
Here the goal is to simply last as long as possible. You can play this on the home page. Good for practice.
Multiplayer
The goal here is to not be playing on the turn where there is no way of getting the target value. You can either play this online or with a physical friend on the home page.