Graviton Wars

Have you ever dreamt of changing the destiny of the entire universe? The dreams come true! You are a commander of the space ship which is located in the far away galaxy among cold stars. Your task is to destroy your opponent's ship with an accurate hit. It is not that easy, star gravitation prevents you from making an accurate hit. In order to get a victory you need to know how to calculate the correct angle and strength of hit, you also must move your ship in time! Save the Earth from the aliens!