FYI: I am not a Codecademy employee. I'm just a user trying to help out. I do not know if my proposed solution will work.
First: try resetting the exercise by clicking 'Help' in the bottom right hand corner and choosing 'I want to restart this exercise'.
If that doesn't work, do the following:
- Hover over "files".
- Click the options icon.
- Click 'New File' option.
- Type 'TopNumber.js' (without quotes).
- Press enter/return.
Then reset the exercise again.
Let me know if that works. If it does not work, I can provide you with the initial code, which you can copy and paste.