NavySinn is a real time strategy game that treats naval warfare and is built with a simple 3D engine, so do not expect too much from the graphics, despite of the three dimensions in which the game is rendered. Everything at graphics chapter is kept simple but other aspects are treated more seriously.
You will have to fight against the Japanese fleet in order to gain control of the Pacific Ocean. This will be hard, especially as their air force is up in the sky, ready to sink your ships. You must create the best strategies in order to win against such a powerful enemy that keeps getting ahead of you.