I considered a blip/bloop noise at a couple spots, but yeah just didn't get to it. I had kind of a weird experience with making the game, where I fell asleep while making it, then had to rush to get an ending possible because the deadline was incoming. I almost am glad I fell asleep because even though I might have gotten around to doing more cool things with it like blips/bloops and gotten the other rooms openable, I might not have realized how little time I had left, and not gotten the ending in.
Thanks for the arrow note. I'll try to keep that in mind in the future to leave more black space at the sides. I'm not sure if Harlowe in Twine can do key presses, but I might try Sugarcube in Twine sometime and that might allow key presses.
Thanks for playing and commenting!