Currently, all the data is stored in localstorage in the browser and unfortunately, there's no way to clear it in-game (this would make a nice enhancement though)
The quickest way would be to use a different browser or incognito mode
The longer way would be to right-click > inspect element
In chrome:
- select the application tab on the top (may need to press the >> for more options)
- Expand local storage
- Right-click on the second URL - should look like a bunch of random letters and numbers in the URL.
- Select clear
In firefox
- Select storage tab
- Select local storage
- Right-click on the second URL - should look like a bunch of random letters and numbers in the URL.
- Select clear