Animation is the longest part of the development process. To bestir all characters and objects takes a time and skill. And a lot of communication with illustrator and coder. Animator also needs to be quite creative to come up with all the moves, funny little animations and responses of clickable characters and objects.
When animator finishes her part, she also, like illustrator before, has to prepare all animations for coder, who will “put it together” to make it work.