This is really interesting! I personally really enjoyed the story & interaction between the player and the abyss/shadow. I played through this twice, mostly due to how much I enjoyed the dialogue, and got two endings: The Normal Ending & "Good Ending" (I'm assuming?)
It's really interesting that the truth that the shadow was trying to hide was a suicide attempt, and I enjoyed the mystery of trying to figure out what was being hidden throughout! The graphics also really enhanced the gameplay and kept me engaged. Overall, I really like this game! I definitely want to try to get the third ending too, as I feel it would probably answer some of the questions I have (the main one being who is the void in relation to the player/in general?)