Nice design but flawed plot
This was beautiful. Cute atmosphere with a tinge of eerie and as it progressed the eerie got more and more prevalent. I liked that. I also liked the sounds and how crisp everything went. I liked the clever obstacles and even Mama who was most certainly the villain in the end.
Unfortunately this just seems really pretentious if you dont give an ending. That's the beauty of the relationship between a game and a gamer, the gamer does everything the game asks; run, jump, grab, etc. And as a reward for the gamer's good efforts, they are given a short cutscene. You see, the gamer doesn't ask for much, they want to know the developer likes making the game, likes their fans and maybe allowing the gamer experience the story the developer is trying to tell. I'd say this is just a bunch of cryptic bullshit covered over with good game design. Maybe you should consider collabing with a writer and just stick to programming and designing.
You can't guise the fact that you're basically just scattering out tidbits of information and appear as if you're artistic. Granted, an artist never reveals all, but this is just silly. Not even a hint there will be a second one.
So I'm sorry, but I personally feel jerked around for spending a good hour or so running and jumping and breaking my fingers to simply find out there is no conclusion. I don't care what sort of message you were trying to deliver, every great metaphorical story has an ending.
I wish I could give you a better rating but the things you're lacking takes off a big, big chunk of my respect.
Also, you have some color glitches going on in the credits.