The long-awaited Pokémon game all about sleeping, Pokémon Sleep, comes to mobile devices this summer, and in a new video released Thursday, The Pokémon Company explains just how one “plays” a game about getting a good night’s sleep.

Like other Pokémon games, Pokémon Sleep is about catching ’em all, but instead of individual Pokémon, players will collect sleep types — and yes, fill out a Sleep Type Dex. How long you sleep and how restful your sleep is factors into the game’s collection aspect, but so does feeding and caring for a Snorlax. Players will get one Snorlax each week, which they’ll feed berries and other foodstuffs to in order to make it grow. Other sleeping Pokémon will be attracted to your Snorlax, and the type of sleep players get at night will affect the sleep type of attracted Pokémon.