The "Factor" setting on squash1 does not get saved to keyframe alongside everything else when pressing 'S', you have to right-click the number itself to set keyframe.
Below is a playblast of my ball squashing and stretching as it bounces:
Figuring out how to create things in Maya by adding a torus and manipulating it to create a simple spaceship. Inspired by the "Void Seeker" in Starcraft 2.