For a game with such a minimalist and alien gameplay, I'd say the mechanics need to be better explained right off the bat. Typically not a fan of tutorials, but I'd rather the game spelled out clearly what the fuck is going on.
One battle ended up being me just cycling through and repeating the same thing over and over once I realized that exact move would have me win out over the skelleman with 1 health left. The demo is too short to get any sort of accurate feel of what the game will be like, and fully grasping the combat up until that point seemed really hard. Died probably 20+ times in the what, 2-3 encounters?
Otherwise, I kinda like what the game is doing with the artstyle and atmosphere.
Also the "continue prompt" could be more towards the center of the screen, hard to notice such a small thing in the bottom right corner of a 4k screen.
Anyway, I'm interested to see where this goes, keep it up!