What a sweet little game. :) I enjoyed the graphics, the music and I thought it was a clever way to make a game concept out of Florence Nightingale.
At first I found it a bit hard to understand, so maybe a quick tutorial or info screen would be nice, but I eventually got into it, and found the gameplay loop to be kind of enjoyable. I did grow a bit tired of consistently waiting for food etc to finish up though, so maybe after the first time it happens, you could skip the wait somehow?
Well done! :)