Lune is a game about reflection and solitude which lets you control the Moon, which implies influencing tides, reflecting light in various ways and modifying gravity. You overcome obstacles that are blocking your way in an abandoned tower on an island in the middle of an ocean.
Use your capacity to manipulate water to flood rooms and free stairways. You can also trigger Moonset and walk in the shadows to avoid the unwavering stone Guardians. Your actions have a global impact on the whole environment of the island.
In Lune, we want each gameplay situation to have multiple outcomes, so you can always backtrack to inspect a new path.