Hey there!
I'm glad that you enjoyed most of the puzzles!
For the eyeball puzzle, you have to find letters in the pattern on the eye, and they are somehow connected to the suits. To get the 'secret' endings, you might have to solve a puzzle differently. There's a hint for that in the game.
If you ever decide to continue playing and need some hints, feel free to DM me on Discord or check out my Twitter (in my profile).
As for music, I was trying to make one that would not distract the players while they solve puzzles. Glad you think it fits the atmosphere!
Thank you so much for trying out Matry's Room. Good luck for the jam!