How to run python code for testing in pycharm (have 2 days)?

Hi, I recently had a professional make a game in pygame for me. I have to test it now within 2 days, so I downloaded pycharm and opened the project in it. Tried to run ‘main’ file (don’t know what that is, but that is executable I suppose).

It says SDK is not defined for Run Configuration. How do I get it to run? I have 0 idea about code or programming…