There is this really beautiful alignment between theme and mechanic here where I'd get one response wrong and I start worrying about whether or not I'm going to be able to get through the conversation at all and I start having anxiety about saying the right thing and I start second guessing all my choices and even the ones that I'm sure about I have to pause and think "is that right?"
I will say that I did get confused at first about how to produce the new symbols on the second conversation. I actually thought I'd get different answers based on whether I was using WASD, the arrow keys, or my mouse. Its hard to say what the right choice is because on the one hand I think spelling it out too much would kinda take away some of the mystery. Maybe having like a mirror or something that you could optionally practice with could work. Maybe I'm just an idiot. Maybe having to struggle to figure it out is the way to sell the idea.