Very nice! I dig the vibe especially. Puzzle design is simple but keeps you engaged. The secrets are cool, I missed a few but they feel right, not in the way so not trivial but not horribly hard to find.
The one thing I think brings the experience down is the camera, the angles feel quite restraining and it points mostly at the ground when you're small. Making third person 3D cams is so hard.
The different elements come together quite nicely and it feels like a finished little game!