I couldn't really play it, but I checked the (awesome) trailer and gave it a try solo with the keyboard and a controller. I think it is really well done. I actually want to play this game with my daughter (when she grows up a bit and can play games :D).
I love the aesthetics, the usefulness of the menu, the movement (with its inertia), the music. Very well done!
One little detail I saw that was a bit weird is that the shadows of the platforms disappear when the platform is close to the edge of the screen. It's probably Unity's screen space, but I just wanted to mention it.