I really like the mechanic, flying through the level first to check the possible ways to solve it was great.
And the amount of interactions with each object or animal was awesome.
The limitation really help to understand the mechanic. So another point there.
My only two complains are the controls, that sometimes felt a little stiff. And the lack of music is unfortunate but I understand that this been your first project and working with Unity also, leave maybe with no time at the end for something like the sound design of the game.
Beside the already mention, the game is fun and is great what you achieve in your first project.
Congrats!