Friday Night Funkin' is a rhythm game made for the PC. It was made by a programmer named ninjamuffin99. It was first made available to play on the website Newgrounds. The game is about a character named Boyfriend who wants to be with his girlfriend. He must go on rap battles with characters who do not want him to. The design of the game was made to look similar to Adobe Flash games from the 2000s. The source code is available in GitHub, mostly written in Haxe.