MONO is a minimal puzzle game that focuses on colors and connections, designed to provide a calming experience. Players are tasked with dragging colors from a palette onto a grid, observing how they spread to connected dots. The goal is to fill the entire puzzle with a single color in as few steps as possible.

In addition to the main gameplay, MONO offers an Endless mode that challenges players to engage their brains by solving an unlimited number of puzzles before time expires. With its simple yet engaging mechanics, MONO provides a soothing and mentally stimulating experience for puzzle game enthusiasts.