Animations do not loop after checking the loop box in animations.
Please, Share your read only link, so I will try to help. Check here
For the loop to work you will need to return your object to their initial states after making an interaction. For example if your animation moves an object to the left 20px, you will need to somehow return this object to 0px position before being able to loop this animation.
But yeah, sharing your link is necessary to get more concrete help.