Seems to work fine on Manjaro with Proton. My controller even worked which was coo.
The art is very flat, I'm hoping it's just early placeholders because it really didn't draw me in and the day-night cycle graphic looks way higher detail. The survival guide is hilarious, really enjoyed that. I also like the music, nice to have something fun playing in the background wihle you explore a tropical island.
The mechanics work very solidly, didn't have any bugs or anything involving the combat.
Can't hold controller button to scroll through options faster in the keybinding menus.
Scrollbars are also nasty, you have to keep the cursor on them and the scrollwheel doesn't work
Should also probably hide the cursor once keyboard or gamepad input is detected in the menu
I hit the options to rebind the shoulder buttons (I use a dualshock and I don't like xbox-style trigger inputs) and it just went to a black screen, I had to Alt+F4 because your game doesn't respond to external kill signals. Not sure if you're engine-devving or not but if you are, make sure you field WM_CLOSE, WM_QUIT, and WM_DESTROY in the message loop.
Feedback on the door opening is either non-existent or drowned out by the music, couldn't hear it at all.
I always have very little patience for timing-based combat, it makes me quickly give up on souls-likes no matter how much I like exploring. I got bored after dying a couple of times in the very first part of the tutorial with the river you have to keep crossing. So I skipped it the next time and explored around the island a little bit. Didn't find any of the armor pieces or the boss. Don't take that as a bad thing though, this is a lot of content to already have for a demo and this isn't my preferred genre.