It's very artsy. I really like the idea behind the eggs and how it wraps up at the end.
The controls are very tight and there's some basic platformer elements sprinkled in all over. Letting your egg siblings be an optional tutorial simply by watching is a great idea. Additionally the sound effect "clink" that happen each jump perfectly matches the anxiety of possibly breaking the egg.
My only gripe is that you can't die like your siblings. Feels out of place to hatch when they can't yet.