Friday Night Funkin' is a rhythm game in which the player must pass multiple levels, referred to as "weeks", each containing three songs. Each week, the player faces a different opponent, though some deviate in structure from this via the inclusion of multiple opponents. During gameplay, the opponent will sing a pattern of notes (represented as arrows) which the player must then mirror by using the arrow keys or the W, A, S, and D keys. Some songs introduce more complicated patterns, with the player's pattern sometimes varying from the opponent's or both singers engaging in a duet. For each week, the player has the option to select one of three difficulties: Easy, Normal, or Hard. As the difficulty increases, the speed of incoming arrows increases, and the patterns of arrows become more complex. The player's high score for each week on each difficulty is tracked and shown in the top corner of the week selection screen.