Oh, "Effects" is the name of the equippables in YN fangames. In this case it's the Octobrush and the Octopus form (which currently only has a cosmetic effect).
I'm glad you enjoyed the game!
I've uploaded the soundtrack onto Youtube, which you can check out here.
https://youtube.com/playlist?list=PLWeduCaw5Qxr7aOtPsPQvmdTqTTlZkU7d&feature=sha...