Why is the game scene empty when I press "play"?

I’m trying to open up a game demo from my class to see what it looks like, but after opening up the project in Unity, going to the “Game” tab on the upper part of the screen, and pressing “play”, nothing shows up. I’m new to Unity so I have no idea why the screen is blank (there should be a title screen that says “Traffic Jam” and a play button). I’ll attach a screenshot of my workspace below. Thank you in advance!

Here is a link to the project if you want to try it out yourself:

Doesn’t look like the game scene is loaded? Also maybe you need to add scene in build settings and check it off.