The ability to spam 0 on level 3 once I'd managed to piss of the wife too much XD
I think the main thing that makes it feel long for the first two levels is the limited options, but the choices are repeated multiple times. It feels like since I've already managed to get a good outcome out of a choice, i.e. changing the baby's nappy, I'm thinking less about what to actually choose and it starts to get monotonous.
The opposite thing happens in level 3, where now I've got too many options to choose from (which I know is the intent, and your message is portrayed well here), but this meant I was now spending a lot more time thinking about the choices. Since it seemed to be the same level duration as the other two, I really didn't want to spend double the time of the prior levels just to beat level 3.
TLDR I'd say that the number of choices could go down for each level by a little bit, but especially for level 3, where more thought needs to be put into each action which takes more time.