Thank you, I'm glad you liked it!
:)
I was thinking about turning it into a 2D game just an hour or two ago; but I'm not sure that I will.
Aside from my complete lack of art skills (and time!), I'm not sure it would feel the same...
The sleep collapse is intended to be frustrating to encourage you to sleep (in addition to being true for parenting, it is also a subtle meta-commentary for the community of game devs participating in the jam).
However, it may need some tweaks to balance it properly.
My first (only) playtester during the jam didn't like that it was a total surprise - so I added a warning message the first time you miss sleep.
It seems that might not be enough, and that the event might still be too punishing / feel unfair.