ParaLily is an action-adventure game on Nintendo Switch that follows the journey of a young girl named Lily. Her quest is to retrieve her beloved stuffed dinosaur, Patches, who mysteriously comes to life and escapes through a door into a series of parallel universes. Players will navigate through these dangerous realms, utilizing Lily's ability to shift between universes to solve puzzles and avoid various threats. Each universe is uniquely themed, featuring different enemies and attributes that challenge players to think creatively.

The gameplay mechanics are centered around the relationship between the parallel universes, as players must interact with multiple layers of each level. Momentum plays a crucial role, allowing players to carry their speed and jumps from one universe to another seamlessly. This innovative design creates a blend of precision platforming and puzzle-solving, offering an engaging experience as players help Lily confront horrifying adversaries, collect magical glyphs, and uncover the deeper connections between her and the mystical realms.