The document describes the steps taken to develop a basic 2D game. It involves creating a player sprite, modifying it to include a hitbox, coding movement controls using WASD keys, creating a test level, adding movement limits, implementing a scrolling background, adding particle effects, creating projectiles with sound effects, designing an enemy sprite that spawns in formation and can be destroyed by projectiles, and coding the necessary events. The developer took a simplistic approach to focus on gameplay mechanics before enhancing other aspects of the game.