The game Q Billion follows the journey of a small mouse as it attempts to level out a playfield filled with stacks of tiles. The goal is to climb onto one stack, push a taller neighbouring stack, and cause tiles to fall off until there are no more stacked tiles left. However, this task is made increasingly difficult due to the non-adjacent placement of the stacks, requiring the mouse to push a tile next to each stack to create a stable surface for itself.
The gameplay involves juggling individual tiles, moving them around to create larger stacks and eventually clear the playfield. The mouse's weakness means it can only move one tile at a time, making every move crucial in planning ahead. As the game progresses, new challenges arise with the introduction of different types of tiles, such as hearts, squares, or stars, which must be grouped together in specific ways to be eliminated. These special tiles require three-dimensional thinking and precise planning to succeed.
Players can enjoy two gaming modes: a time-limited mode where they must solve ready-made puzzles, and an editing mode that allows them to create their own levels. With its unique blend of puzzle-solving and strategic thinking, Q Billion is a classic example of the Sokoban-style Japanese puzzles that have captivated gamers for years.