Well, it could be okay. If the relationship ended amicably, playing a game together while they watch your story can be like a friendly interaction. However, if there are any hard feelings or jealousy, it's probably not a great idea. You need to consider your own emotions and how it might affect your current life and relationships.
Well, it might not necessarily mean much. Sometimes people just casually look at stories without any deep intentions. They could have just been scrolling through and your story popped up. However, it could also be that they are having second thoughts about the break - up and are using this as a way to keep a connection, no matter how small.
Maybe it doesn't mean much. They might have been scrolling through and stopped on yours without any specific intention. Or it could indicate they're curious about how you're doing after the breakup.
If it makes you uncomfortable, then you might have a reason to be concerned. But if you've moved on, it could be their problem, not yours. You can always limit who can view your stories if it really bothers you.
When your ex watches your stories, it could indicate that they haven't fully moved on and still have some lingering feelings. However, it could also be a casual act without any deep meaning. It really depends on the context and your history with the person.