Thanks for playing! I'm glad you like the animations and it's quick to understand.
With the theming I was struggling to come up with something which why it might be a bit unclear sorry about that, but my idea was basically Alma's wants (drinking red apples' colour) at the cost of her needs as a vampire ( drinking human blood ), so the more she's drinking the apple colour's, she's starting the crave human blood at the same time, which is why the challenge get's harder over time to represent it getting harder for her to fight off the craving for human blood.