Friday Night Funkin TEST remix is a free online rhythm game available at fnf.gosprunki.net. This is a Scratch port of FNF featuring a custom rhythm engine built by the original creator. The creator emphasizes proper crediting if anyone uses their code, as many have taken it without credit.
Because Scratch has a pretty bad syncing problem, click the green flag more than once to improve synchronization. You can also press "P" to toggle auto-play mode, which lets the game play itself – useful for testing or listening to the music.
This is a port, not an original claim. The creator made the rhythm engine from scratch and expects proper crediting if reused. If you see anyone claiming this as their own, they did not make it. Play the game as intended – respecting the creator's work.