overall a good game. you have to collect all hearts to be able, to join the next level. 

The atmosphere is kind of cute but it is a bit too difficult (due to physics)! Good job overall.

I enjoyed the mood of this game! Fits the theme well. And great job considering that you recently started with Unity. I had difficulty with the movement too as @magneticduck said. I think that may not be where the "fun" is in the game, and so maybe look into different approaches for character movement controllers (e.g. when arrow keys are held down, set the velocity to a fixed value instead of adding a force, or maybe some drag). That needs tweaking. But wonderful entry! I really did enjoy this, and there were lovely sound effects too which is often overlooked but crucial.

It was hard to get used to the horizontal controls worked, but I finished the game -- with my heart in my mouth ;) It was interesting how you could "climb" platforms by moving into them sideways and how you could jump on the debris produced by a destructible platform. Nice work.