Defense Center

A positive energy esphera located in the center of the screen needs to be protected from negative energy walls that try to crush it. Power walls are scheduled to move continuously toward the center of the screen to crush the ball.
Your goal is to prevent the positive energy esphera be destroyed by the side walls. In this case, you must use the defenders arrows positioned around the ball to reach the walls. When a wall is reached, it will drop a few inches away from the esphera.

WARNING: Achieving the wall is not as easy as it sounds. These walls of evil, have so much energy that constantly change color and with great speed. So to get really achieve them, you will have to quickly change the color of the central esphera until it is with the same color as the wall chosen as a target. Only after this feat, you can touch the white arrow and shoot it against the wall of energy.

Whenever one of the walls is reached and the esphera have the same wall color target, will be registered one more point for the player. Otherwise, the wall reached forward with more speed toward the center esphera.

The game ends when at least one of the walls reach the ball.