I restarted the game and I must admit that it gives a plus with the sounds. It's more imersive but I have an idea of the gameplay.
What if babies get over it after a while? I mean sometimes I had a hard time finding the red key or the other item. And I would find that would give the game more challenge.
I contemplated making the babies stop feeding after a while and start chasing you again, but it messed with the mechanics (set number of babies to bottles etc, and the rules for finishing the level).
I originally planned to add an arrow that points you in the direction of objects (like a compass), but as it was not essential to gameplay, it got left until the end and time ran out...
