The art style is cute and simple and ties in really well with the sound design. The game "feel" is really good as well, with all the sound and visual feedback you've implemented. But I did feel like it is hard to get to 20 coins (I didn't really get higher than 12, I must have missed something?), and it seems like all 3 characters share the same health which I don't feel is intuitive.
Also, really good use of time which I don't see much in jam games, but bed time interrupted me way too much! I wonder if it might be better to have some benefit to bed time such as regenerating some health, or maybe slowing time down so it isn't so frequent. I also found that jumping and hitting the ceiling (with the mother) makes the character stuck there for a few moments.
Overall, I had fun, and I'm particularly impressed by the way the game feels to play :)