Animation is broken when playing game

My animation is fine when playing in moon animator but when I play the game it breaks and multiple part move backwards.

robloxapp-20220531-2319076.wmv (1.2 MB)

When you’re moving the parts in the animator, are you making them detached like that or is that just happening for another reason? I’m not the most qualified person to answer your problem but maybe there’s some step you missed that made you mess up? I would go through the steps you’ve done, not start over but make sure everythings doing what it should be! Hopefully this explains your problem.