Gravitee is the most fun way to understand how gravity works. It may sound strange, learning something from how you shoot golf balls from one planet to another, but it works. The more mass planets have, the stronger their gravity is.
Let’s not get lost in potentially boring theory though! It’s still a game and a very fun one indeed. It’s a refreshing take on the golf genre that has not really changed in recent decades. You won’t have the hassle of picking the right club, just click on the ball, plan the trajectory and release the mouse button.