I enjoyed this game.
I thought it was pretty abstract. I liked the tension the bird character created, and the insidious and kind of creepy/crazy tone of the game. I felt as if the non playable characters were meant to be seen as kind of passerby individuals/mundane day to day people you encountered. It's clear we're obviously playing some guy who is probably insane if he thinks killing people stops the noises and brings songs to his ears. I think you manipulated/coerced the player well into making it easier and less hesitant to kill/shoot the gun, and that is the real genius of this game.
The only part I did not like was the final scene.I felt like there was no transition to know that was the ending, so when I had the gun in front of all those people, and I kept clicking and they were changing characters, I was not sure if I was supposed to shoot and kill them, like it was another part of the game, or what. Then I realized that scene was the finale of the game, and I am guessing that the goal of that scene was to show the player to face the humanity of all those people (well, animal people) they killed off without blinking an eye in order to "stop the noise," and feel sort of a remorse for that (evidenced by the sentimental piano music with a woman singing somberly). Maybe my interpretation is off, regardless though, I think that scene went off a little too long than needed and maybe you needed something else to tie it together. I felt as if you really wanted the whole song to be heard or played until the game officially ended, but in my opinion I felt the song was a little corny/expected.