I just played the demo and it looks great! The graphic style is very beautiful and original, I love it. I find the characters very interesting, especially Elias, and I'm really looking forward to learning about his story and the things he's done. In general, Elias's house and everyone there were very interesting to me.
I love the dialogue options, and since you can only perform certain actions if you lower your shame, I'm sure in the full version of the game I'll spend hours and hours repeating actions with the stats changed to see what changes.
Felix's part was being less fun for me (mainly because i already did most of the interactions with Elias), but Felix's unique interactions were fun, and the ending of his part left me so intrigued I think I ended up liking it even more than Elias's.
I quite like the interaction with the PC because you can type in what you want to search for. I imagine there will be some interesting things to search for in the full game, and I think it will be interesting to see what you can search for.
I didn't realize until after playing it that the characters have a set amount of money and it goes down if you buy stuff, I thought it was infinite haha, so I'll probably play it again to see if I can buy other stuff if I don't spend the money on beer.
Finally, and just for feedback, when you go to the sushi shop you can walk over the door, walk above the buildings and get stuck there. It's not a big bug and doesn't ruin the experience at all, but I figured you'd want to know :) (I left a screenshot of that) (I don't want to sound like I'm criticizing the game, I really loved the demo and I'm looking forward to playing the full version, but I figured you'd want feedback on these things)
I loved the demo, I'm really looking forward to playing the full version, i'll see if I can pay something here to help the development because I really liked it a lot :))
edit: I know absolutely nothing about game development, so maybe the things I say are nonsense or intentional, but anyways haha, maybe it's not possible to do it but, at least for me, it's a bit awkward to play with the direction arrows instead of using WASD. It's not a big deal and you get used to it after a while so it's not a problem, but maybe a controls section in the settings where you can change that would be nice :D