I was right thinking this was something like a tamagotchi.
I see this as a good concept, I never expected this to have some kind of transfer mechanic, a nice idea would be to have another kind of spirit animal that could be added that way, that would be so cool.
Getting money with that few minigames ain't fun either, they get tiring so easily, but I can see it as the preview of something bigger, so it's ok.