Animations are a work in progress for jocoserious.

Animations can't be used in-game.

There is no way yet to control which variant of an animation is played (soon you'll be able to define slice "variant data" for that).

Animations you create (in the slice or sprite editors) are now saved, but only to temporary locations, and will all be wiped when animations are finalised. 

The currently playing animation isn't saved.