Pretty fun. I can see the foundation for a really interesting game here. Because this is more of a proof of concept than a fully complete game, I don't think I can critique the gameplay, but there are a couple things that bugged me.
During the driving sections, it got annoying to constantly scroll to the max number of hours. Maybe add a toggle that automatically sets the driving hours to max?
And - I like how you modeled the MC, but it can be difficult to see the actual model in some areas. I think the game would really benefit from a gallery-type section; select the number of babies and how far into the pregnancy you are, and you can rotate and look at the model. Only the pregnancies the player has unlocked can be seen.
But, beyond that, this is a fun idea. I really like the travel system, as it speeds up the rate that the player will see bigger pregnancies. And all the character interactions are surprisingly fun, despite how little content there is! I like the characters a lot.
Random suggestions: a messaging system from the characters to the MC (just because it feels weird that they spend literal days talking to no one), the ability to upgrade your shuttle, and maybe having larger pregnancies be locked behind upgrading the different areas? Idk.
I'm excited to see this continue, if you decide that you want to. :)