I'm a huge fan of The Witness and Obra Dinn so when I read the description I had to play it! I loved the style and atmosphere and how the game teaches you the "rules" of each run with minimal instructions like The Witness does. Two things were really unfortunate though:
- One of the "correct" doors in the rune guide puzzle is not the actual correct solution judging by the rules of the runes. Another commenter mentioned this and going off that comment I think it's room 10 (the hourglass looking icon). The left most door is the correct option ("MIE") but it removes a heart to go through that door. The middle door is not logically correct but is the door that lets you continue to the next room ("MI"). I played the web build though so maybe this was fixed in the windows build only.
- There are at least 2 logically correct solutions to the main room puzzle but only one unlocks the final door which tripped me up. I wish there was an indicator of sorts that you need to use a certain number of runes or something. The other solution I came up with was 3 runes: "OA-E-I" which I quadruple checked, ran by other people, and confirmed that it would come up with the same correct final image. The accepted solution uses 4 runes but I won't spoil it here ;).
Overall though I really enjoyed playing this and I would definitely love to see an expanded version that introduces more runes or other puzzles. Amazing job!