I really enjoyed playing the organ! Would've liked to keep playing it. There's a nice, spooky atmosphere even though the game is very bright.
Looking up at the sky could've served some gameplay purpose. The real image of the human eye was the creepiest thing in this game. The face on the monolith was adorable.
The puzzles were very simple, though I expected to be able to break the rusted lock with the stone.
I didn't get the story. The epilogue mentioned something about guilt but I have no idea how that ties into the game. Maybe the main character did something bad as a child or to a child? Or maybe the "familiar someone" took the main character into that dark place when the main character was a child.