Hi @Kelly_Nickell,
the easiest way to place interface elements, such as a timer or scoreboard, to the camera is by attaching a text item to it. Here’s how it’s done.
First, create a text item and make sure it’s added to CoBlocks. Then attach it to the camera.
Then, with the setText - block you can change the item’s text as you see fit.
You can set as many text elements to your camera as you like with this method. Just make sure to consider different screen sizes so that information is always readable 
I’ve attached an example space that demonstrates how you can create an interactive score board. You can copy it by pressing the remix button. Hope this helps!