I'm making a pretty simple top-down shooter, which so far only has one level which I use for testing. I have been working on the UI recently which includes a "Restart" button which appears on death. I have used UGUI Button on click event to send an event to another state which contains the Restart Level function. However, when I click this restart button, I am simply presented with a black screen with my restart button on top of it. What am I doing wrong here?