I thought it was a sweet, interesting game. I liked that it was interactive and how some of the pieces of eternity were harder to find than others. The ones between the buildings in the Metropolis stage were very interesting. A place considered a failure (not being able to make the gap) hides interesting surprises that in turn are not failures at all. Almost encouraging the player to make mistakes.
The animation was also cute as well. I loved the model used for the player's character. If you were improve on this in some way, I would encourage making the story more interactive and why getting the pieces of eternity would be a good choice to grab.
Otherwise, I give it a 3.5 out of 5