That was an absolute roller coaster!
First up, the creepy factor of this game was incredible. I really liked the progression of the character models and the map, from normal to malformed - it was very effective. The scrawled text was a very nice touch, and made it *chefs kiss*
Sound was used very well, and really immersed me in the game (As far as you can in a 2d platformer where turtle's talk). It was simple, but worked really well in the way you'd applied it.
Next, the gameplay was very fun and I really enjoyed the process of trying to find the 2nd ending, after getting the false ending. Only thing you could've improved on would probably having a slightly more interesting map, and more endings - but given the limited time and the theme of the jam, the simplicity of the map design did build on the creepy factor very effectively.
I'll add some more stuff to this comment if I can think it up, but overall, very well done - this is an excellent submission and even though you made it in only 3 out of 10 days, it is definitely a strong contender imo!