I would think, if you are looking for great feedback, that the Developer Journal section of the site is the best place for you to showcase this off. Addditionally, you can use it to build your community!
I suppose that the most important part of the survival horror game is sound design and music
I would say you are very close to the more abstract layer. The MOST Important part is how the creator invokes the feeling of fear and horror. If this is done by amazing music or timed FX than yes I would agree with you. However, it could be done thru a well written narrative. So while sound is a great way to get the correct emotional direction it isn't the only.