This was fun! I really appreciated having a set of consistent and predictable, but not precise controls to try and manipulate unpredictable elements in a physics sim.
The puzzles felt like they were ramping up nicely along a difficulty curve that eases players into thoughtfully using the different buttons.
I found myself wishing that the idea that the green boxes contain babies was visually communicated - maybe a logo of a bottle, a nappy, or a dummy on the side could help reinforce that and tie the game itself back to the the name and framing.
Hope you had a positive experience using Godot, and thanks for doing a Linux build :D