Pendulum on Cart

## Description

Trying to stabilizing a single pendulum is a challenging task. In this app, the user could control a cart that has a single pendulum attach to it. The goal is to swing up and stabilize the single pendulum at its upright position. This is a very difficult task. We provide two play modes. The first one is the swing up of the single pendulum. In this mode, the user needs to touch the screen to decide the pendulum cart's position. Through the movement of the cart, the player needs to swing up and try to stabilize the pendulum at an upright position as long as possible in a given time. The longer the user can stabilize the pendulum the higher their scores will be. The game will end after a given amount of time. The second mode is the stabilization of the pendulum. The pendulum is let go near an upright position and the user needs to control the cart position by touching the screen so that they could stabilize the pendulum. The game will end if the pendulum is too far away from its vertical position in this mode.