Hello ,
I have a problem with the UI from the zindex properties. I gave the UI I wanted on top a higher value for the zindex than the UI under it but it seems not to do anything with the layers. I think that I am doing something wrong or its a bug. Here are the images of the minimap and the time UIs:
If they are inside different ScreenGuis, you have to play around with the DisplayOrder property of ScreenGui.
If they are inside the same ScreenGui then change the ZIndexBehavior property of ScreenGui so zindex behaves globally.