Really neat and unique premise! My biggest gripe would be the lack of direction. While you get that you're supposed to scare the guy, it's unclear how to raise the tension, especially how to interact with them outside of killing them (the loud speakers). Just having a pause screen where you can reference the controls would help a good bit. 

Overall I had a lot of fun. I think it benefits from the shoddy construction, but a more fleshed out release with more dialogue variance and more ways to interact with the streamer (or more streamers?) would be neat to see.