Loved the gameplay and good story! Hearing the dialogue sound effect weirded me out at first but it grew on me once I heard other character's dialogue. I thought the "puzzles" were just the right amount of difficulty as someone who sucks at puzzles.
For me, the ending felt a little abrupt. It just felt like everything happened at once. I can't really point as to why I felt the ending was abrupt as there was a fair amount of buildup. But maybe it wasn't enough buildup or emotional impact leading up to it? For example, when the player finds out who they're playing, the character reacts casually and moves on, so I didn't find that believable. So perhaps there needs to be some work with the dialogue to pack more "punch" to impact the player.
I did like the mystery and enjoyed making the connections to try to figure out who he was. Overall, great game!