I enjoyed the demo, honestly I saw the big demon man and 'best friends' and I was sold. Like, damn <.<
I liked your art, and the running animation. I also really liked your diversity of characters. Multiple different personalities and looks are a huge plus to any game. Plus like I said I love a good demonic character :3
Tho when I tried to mute sounds (I like listening to spotify while I play) they didn't seem to mute, I still heard the hawk sound and running noises.
If you're looking for writing advice/feedback read ahead, if not please ignore what I had to say, I only wanna say it if you wanna hear it:
The writing seems a 'little' fast-paced. I'm not sure how long you're intending to make the game, so if you're trying for something short then that should work, but if you're planning on making it a little longer then it might be a good idea to let the relationships develop a little slower? It might make sense for the best friend and fugitive (since he's a flirt and also new to the party) but having everyone starting off immediately showing interest in the MC leaves the story feeling a little lacking. Like if this was how they were interacting, why hasn't anything happened sooner?
Also don't forget that it's okay to use context clues, for instance instead of saying the prince doesn't like his royal duties, maybe you could have Claudin call him prince disparagingly and Arthur look away in discomfort. Or instead of having the MC have a inner monologue about how overprotective Claudin is, have him move in front of her with Kasanov, and then when he shows annoyance at Arthur for pulling the MC away you get the context that he's a little possessive. I know you're trying to set up all the relationships and character personalities quickly, but I think adding a little more subtlety to the game would really enhance the story you're trying to tell. It might help to pull everything back a bit, instead of a growl a huff, instead of a hand on the thigh a flirtation smile, and then bring more back in areas where it feels like your point isn't getting across.
But again, all that is only if you wanted it, if this is the style you want to write in then power to you, and I wish you the best either way. ^.^