Plane war

~How to play:       1. Use WASD or Arrows to move       2. Use the Space key to fire the bullet ~What are we going to do:       1. Use bullets to destroy enemy ships       2. Points will be awarded after defeating the enemy       3. You can use points to upgrade your ship       4. After upgrading all the upgrades of this level, you need to upgrade the spacecraft       5. Bullets can only be obtain…