Wow, I just downloaded Badabits (found it in It’s All Widgets) and I really like the clean interface, animations and characters.
After few minutes using the app one can see the complexity to build all that interactions and transitions.

Could you share a bit about the architecture you have chosen? At the beginning I thought you used SpriteWidget or Flame Widget, but then I read you used rxdart, which I never expected can be used to create a mobile game. Kudos!