retro video game, class of 09, pixel art style, vibrant colors, high school setting, teenage characters, nostalgic atmosphere, side-scrolling gameplay, 8-bit soundtrack, character customization, dialogue choices, multiple endings, interactive locker, gymnasium background, classroom environment, text-based interactions, decision-making mechanics, virtual friendships, in-game achievements, 2D graphics, arcade controls, user interface, HUD, health bar, inventory system, save points, level design, boss battles, power-ups, collectibles, secret areas, walkthrough, cheat codes, online leaderboards, single-player mode, joystick compatibility, soft lighting, CRT monitor effect, sprite animations.