The game offers a diverse range of puzzles and mini-games that require players to combine information and solve a "huge variety of challenging" problems. For example, one reviewer noted that the puzzles included both "very easy" ones as well as more complex challenges that "take a while to figure out."

Many of the puzzles are described as "interesting" and "fair," with clues and solutions that, while not always obvious, make sense in retrospect. As one player mentioned, the puzzles often require "logical thinking" and "problem-solving" skills rather than just pattern recognition.

The hint system is well-designed, requiring players to solve a small "trivial puzzle" to access clues for their current location, striking a balance between providing assistance and preserving the challenge.

The surreal and abstract world of Mononino is engaging to traverse, with a "fantastic land" full of "strange creatures and secrets waiting to be discovered." As one reviewer put it, the environment has an "air of mystique" that evokes a sense of dreamlike wonder.

The atmospheric soundtrack, created by award-winning composers, complements the game's unique visual style and helps to create a cohesive and immersive experience.

The game's progression is well-paced, with players gradually uncovering information and clues to advance the story of recovering the lost leaves. As one reviewer noted, this sense of discovery and problem-solving keeps players motivated to continue their journey.

While the narrative is not heavily emphasized, the lack of explicit storytelling allows players to make their own interpretations and connections, which can be a rewarding aspect of the experience for some.