You should see a folder name SOURCE in the project folder. If it is empty or not there create one then on the project icon for shootergame right click it and then select “Generate Visual Studio Project Files”. You can look through the files there or if you are curious about one that a blueprint is made from you can (in the editor) see the parent file in the top right corner and open it from there.
You can also open the project directly from the editor by click file and ‘open project in visual studio’.
if you are also interested you can follow the control inputs by looking at the Inputs under the project settings.
Hope this helps.