very fun game! my favorite part is upgrading my cages so my animals are better! I think it would be even better if all the animals had more complex idle animations in the zoo like tigers and lions would claw at the toys and the vultures would fly to the rock when you upgraded it enough also stuff like the birds capable of light had cages or glass cases around them and if the giraffes ate the trees in the cage and if elephants sprayed water on themselves. ya'know, just really aesthetic stuff.