Thanks for the suggestions, I'll definitely look into some of these! I was planning on doing lower quality audio for some characters and sounds, but I couldn't quite figure out how I wanted them to sound and just sort of forgot about it. There is some distortion for a couple of voices already though. Playtime, obviously, and Principal of the Thing actually has a high-pitch squeal in the background of his recordings, similar to what you could hear in some old games. It's pretty hard to notice though. I definitely intended to add more sound effects too, which I'll probably include in future updates. I've already considered MIDI/Synth sounds! I'll look into those voice synths too, thanks for the info! If I ever add more characters something like that could work great for one of them.
And thank you so much for noticing the smoothness! I had no idea about that, but just checked how it affects the textures and it looks a lot better now!