I like this!
It's very simple, but it executes those simple ideas very well.
I have 2 main problems; 1 is that it's not really all that clear how to get the best ending, and 2 there's a few rooms that are kinda unfair. For example, on the top leftmost room, in order to see what's at the end of the hallway you MUST take damage. Furthermore, you can't see far enough in it to know if there's a soul or not there, forcing you to go there and take damage to see. (There isn't one there, making this specially infuriating).
Other than that, I really like the game. Ya did a great job!
Btw, I'd say the game would be better if the camera was more zoomed in so you couldn't see the entire map at once. Having the camera more zommed in and close to the protagonist would help with the immersion and to give a claustrophobic feeling, plus allowing you to get lost. Getting lost with a super close camera in this game would be super cool, specially considering the salt trail mechanic to help you re-orient yourself.
Overall, really cool game!