He told me that his new song for the character Darnell’s “Erect Mode”—Friday Night Funkin’s codeword for the hardest difficulty setting—might be the craziest tune he’s ever done.

Her work has previously appeared at NPR, Wired, and The Verge. The Newgrounds sensation Friday Night Funkin’ is getting a “full version,” complete with 60 new songs, two-player mode ...