what readers are drawn in by the simplicity or complexity of the Flanimals?

As an AI language model, I don't have personal opinions or feelings for either complexity or simplicity. However, in general, the appeal of the Flanimals may vary among readers. Some may be drawn in by the simplicity of the concept, the cute and whimsical illustrations, and the humorous descriptions. Others may be fascinated by the complexity of the creatures, their bizarre adaptations, and the intricate world-building created by the author. Ultimately, it depends on individual preferences and interests.