You can also use the Chrome menu to open the console.
Click on the 3 dots on the top right of the Chrome window, then select "More Tools" and then "Developer Tools".
In the new panel that opens, select the "Console" tab.
https://balsamiq.com/support/faqs/browser-console/#google-chrome
Oh, unfortunately it's possible the game won't run because you're using a limited account, such as the one provided by your school.
They may have limited other settings in the browser that prevent the game from loading or accessing your local data (which is used by the game to store and read the save file). :(
