Flan's MS is a 2D story game with some puzzles and gameplay systems. After escaping from everything she is familiar with, Flan needs to retrieve her lost dream diary and find the answers she needs.
The game limits players to moving the protagonist, Flan, left and right. Players cannot run or perform any special actions, but they can interact with hotspots in the environment using a single button. These hotspots, marked with an icon and exclamation point, trigger unique comments from Flan or allow players to collect items and notes in her notebook.
While the core movement is simplistic, the game introduces a reasoning system through notebook-based puzzles. Players must drag and drop items within the notebook and experiment with different interactions, such as asking, giving, or threatening, to progress the story and unlock new information. The review notes that these puzzles are relatively easy, with solutions often nearby, allowing for quick experimentation.
Despite the minimalist gameplay, the developers have crafted a strong sense of atmosphere and exploration. The pixel art is praised for its unsettling imagery and ability to convey a horror-inspired ambiance. The slow-paced, deliberate movement encourages players to take their time and observe their surroundings, immersing themselves in the game's mysterious world.