It is up to one's taste, I do think it would work better in another POV but your suggestions of reworking some scenes would really make a difference (only hearing half of the conversation and other touches) and would help the game flow a lot better.
A sweet spot can be found between yanderecon's thoughts with the introduction of character and yours: make it so it doesn't take in-universe time. An idea can go through your mind in a second so the "thinking" of the character introductions can be done without Mc having had to space out for a while to get the idea to us.
Personally I think that's where 3rd pov would make it a lot easier to write those moments, cause getting that information out in 1st pov AND make it sound naturally takes a lot more effort.
I've been in similar situations where I've felt sweaty and gross from work and didn't want to show my whole face.
Yeah, don't we all sometimes feel like that, the thing if for years you just show the ceiling... it's just weird. Weirdness and dissonance can easily take readers out of the moment. I can hold my disbelief for so many things while reading a story, I love feeling in a story, but stuffs than don't correlate properly makes it feel like there wasn't a beta-read. I don't mean this a diss at the creator, I do think cutesai is doing something really cool and you have to be quite brave to put your work out for the world to see. I mean this as honest well intended critic.
Yes, I also believe the hearts as ctc are in part with the aesthetic, it just confuses me sometimes, easily a me-problem.
Cool that the Leon scene was identified and was just a bug.
Yeah I get that Teo is meant to be disliked, he is extremely dislikable, but in a way that is my point. As presented right now I can't see the thought process of the characters that make them keep the dude around and that takes me out.
Everything else in OP's comment I agree on though!
Got me a little chuckle that you only refer to my positive intake there jajaja. But yes, there are a lot of good things in this demo, the work can be seen. I'm curious to see how it evolves, I want to see to rest of this story. Cheers!