YO! This is a cool game... I really like the visual aesthetic and atmosphere. The post-processing effect is really neat, the tweening animations were quick and fluid and the torches lighting up on entrance was a really nice touch. The puzzle itself was really great in it of itself. I highly appreciate games that don't use text to convey instructions, and I think this game did very well on that.
A couple things I was confused about tho was that there was one room in the rune guide that had a wrong solution (I think)... but I don't remember exactly which one it was. Also, the room in the beginning was also quite confusing since I there are 2 unexplained runes with no way of experimenting with. There also doesn't seem to be feedback on how many runes can be selected or which runes are currently selected. I tried doing: rotate 90 cw, mirror vertically. and invert color.... and that didn't seem to work, so I just spammed other combinations that I thought could work but none did.... So I can't tell if there was a solution or not.
Overall tho, the game was great! Definitely nailed the 3D puzzle game feel. It's cryptic but consistent (mostly), and is incredibly visually pleasant. Great job!