That was an extremely polished game with an awesome atmosphere which was so well supported with the art, colors, the music and the little story! Also love how you decided not to kill the player, but punish him with a scared boy phase. I do have something to point out though.
The use of the recorder was brilliant with the theme and very atmospheric, i loved it. However, you had such a long time to play the music that you could walk through most of the level safely without any worries, the rewind was ultra-quick too. I think it could support the horror/scary aspect of the game more if it was more limited and/or balanced. You can also play the whole game without ever stopping, there is little to no challenge, as well as limited gameplay. Limiting the use of the recorder and trying to figure out something to make it more interactive could push the game on another level in my opinion!
But i know the time is very limited and its clearly seen where your priorities were and you over-delivered on those, very good job! Will be one of the most memorable submissions for me!