2D Shooter

Changes:
- There is a Mother Ship which spawn the enemies

- You can win killing some amount of enemies or killing the Mother Ship

- There are some asteroids running through the environment, you if hit them, you die

- There are some planets at the environment which you can collide on them and take damage

- There is an arrow underneath the main ship always poiting to the Mother Ship so the player can locate it

- New Script for making the Mother Ship navigate through the environment