# Yoshi Topsy-Turvy ## Overview *Yoshi Topsy-Turvy* (known as *Yoshi's Universal Gravitation* in Japan and Europe) is one of the most inventive and experimental titles in the Yoshi series. When a mischievous spirit named Hongo traps Yoshi's Island within the pages of a magical pop-up book, Yoshi must embark on a quest to satisfy the book's various spirits to lift the curse. What makes this game truly unique is its core mechanic: players must physically tilt their Game Boy Advance to change the game world's gravity. ## Background Developed by Artoon and published by Nintendo in 2004, *Yoshi Topsy-Turvy* was a showcase for hardware innovation on the Game Boy Advance. The game cartridge itself contained a built-in tilt sensor, a novel feature for the time that it shared with other experimental titles like *WarioWare: Twisted!*. The goal was to create a new kind of platforming experience where interaction with the physical game system was just as important as pressing buttons. The game's charming, storybook aesthetic and unique control scheme make it a memorable entry in the GBA's library. ## Gameplay *Yoshi Topsy-Turvy* is a 2D side-scrolling platformer controlled in a way unlike any other. While Yoshi can walk and use his tongue, the primary way to navigate the world is by tilting the console. Tilting the GBA left or right rotates the entire game world, causing platforms to swing like pendulums, loose objects to roll downhill, and even turning walls into floors. Each level is governed by a spirit who sets specific objectives, such as eating a certain number of apples or defeating specific enemies. Completing these challenges is necessary to progress. This focus on physical motion and goal-oriented level design creates a unique puzzle-platforming experience where players must constantly think about how a simple tilt can completely change their approach.