Yeah, well thought-out. You sure don't hold back praising your own game. And yes, when the entire scary comes from random jumps with loud weird noises it is cheap. Why? Because when they are over you are left with "what the hell was that even?" feeling even if you flinched for a moment. Everyone uses them, yes. This is why there are so few good horror games.
You could as well put this "it's just a prototype" in the description of the game, by the way.
If saying that the puzzle you made is well thought-out and this is an objective fact is not praising yourself, then I don't know what is. But whatever, if it tastes nice, doesn't matter where it came from, right? I'm sorry that I hurt you developer's feelings.
And do you really expect people to specifically go into "more information" to find out this is a prototype for something larger? For a 5 minutes horror game? Really? Most of the people just view screenshots, read the description (some don't even do that) and press the download button.