Minor spelling mistake which obviously is unintentional.
That’s because that’s what the instance is called. It’s class is “RunService”, but the instance is called “Run Service”.
print(game['Run Service']) --> Run Service
No, it can’t be changed, because compatibility reasons.
So how comes it is returned with RunService when using :GetService()?
It most likely searches for the class name. Most likely why a lot of services used to be named “Instance” before