This is really really fun, the story generation at the end is a really fun touch. I have a little feedback if you're planning on adding or changing anything, but the game is a lot of fun already.
I dunno if this would be easy or hard but if you could add some setting to be able to zoom in or change the font size, that would be great. It's a little tricky to read as is.
There are a number of issues with the grammar when you change the mother and father's pronouns at the end, mostly stemming from the fact that "her" is not just equivalent to "him" but also occasionally equivalent to "his." I dunno the grammatical terms for it exactly, but I had an issue trying to change the mother's pronouns to they/them/theirs where the story would sub in "them" when the correct term would be "their." Notably, there aren't enough slots in the input to actually include all the necessary terms for either character to use they/them pronouns, so that might be more difficult than just proofreading.
This was already a really fun idea and I hope to see more!