[Directory Structure]
spaceInvaders/
βββ src/ # All .cpp and .hpp files
β βββ core/ # Database, Game engine, Background
β βββ entities/ # SpaceShip, Alien, Laser, MotherShip
β βββ states/ # Menu, Playing, Settings, etc.
β βββ main.cpp # Entry point
βββ assets/ # Graphics, Sounds, Databases
βββ LICENSE
βββ README.md