This is definitely the slickest demo I've played, the character animation are so fluid and responsive that is just a Joy to move around with the boost, slides and somersaults at the point that I was almost disappointed when I found a double jump, in my opinion it would be more cool to merge more momentum based movement like some sort of mario 64 2d but I can see people not gitting gud and need of a boring double jump to keep height.
Also sound was a part of my enjoyment as the dark atmosphere they both crude and raw in this first section of the game that reminds me what I enjoy in souls likes atmosphere when done well (I couldn't tell what was 3D and wat was not)
I think the slide should not interrupt in the middle of a small passage, I than discovered that I can hold the button to make it last longer, Idk felt weird to have the head stuck in the wall
I don't know if it's only me but I found bosses extremely basic but not in a negative way as they were predictable enough to learn it after few second and it was only a matter to master the right movement, i really like this intuitive direction that makes you aware that you can dodge and is all about to figure out how to do it.
I'm looking forward for more progress on this game.
Tested the windows version on Linux with Proton