The controls are a little frustrating IMO -- I felt like I had trouble being precise with jumps. And, I think other folks are right when they mentioned the gravity feeling a little too strong. But the artwork and audio are beautiful and creepy (I love the unnerving cryptid vocalizations), and you've employed the jam's theme beautifully. The puzzles were enjoyable and seem to be the right amount of difficult. And, I had fun riding in the little cart. :)
Overall I think this is a really good submission, great job!