I almost missed this comment, I wasn't notified about if for some reason. Sorry for the late reply!
Subtitles are definitely something I've been thinking about, since the game relies on audio quite a bit. I'm not quite sure how to implement them (Since the direction sounds are coming from is just as important as hearing the sounds themselves, so I've been thinking of ways to show where sounds come from as well as what sounds are playing), but I'll definitely look into it if I update the game again. I can't make any guarantees I'll get subtitles in, of course, but it's definitely something I'd love to be able to do if I can figure it out! Would be a good learning experience for me, too!