I'm gonna play it and review the shit out of it. From watching Youtuber IGP (IGP's vid) and (Markiplier's Vid) Markiplier's experiences , this is the way a game about this creature should be.
No good ending. Atmospheric to the point where you feel there. Absolutely wonderful design. Two things I saw in the video are to be fixed however. One is the floating Sirenheads, the second is the (just kidding, nothing bad about it) Not able to save feature, as i see and feel often that pulling up a menu and saving every step gets you out of the game and ruins the experience to an extent. Maybe a lot at times. I love the classic game over screen when he gets to you, as a jump-scare that isn't cheaply played; but in my imagination there could be an animation of... your character looking up (slight smooth forced camera pan), and Sirenhead making a noise to fit the situation, then he slashes at you, then the screen turns 'Game over' then to black, you and your character scream as he beats you to death; all in the span of a few seconds...
...fading out for a few more. Back to the title screen. If i got scared just by watching a video with somebody playing it kinda with me, then... playing it by myself will be a truly horrifying experience.
This game looks amazing and deserves to be developed much more, and the creator deserves the funds to do so. I will give him a sum of more than 5 after I play it. I am enjoying this a lot! :)