dev. How could I add some new changeable mazes in this code？

[lyquentxy]

I‘m using pycharm to edit this code，but I couldn't open the maze's index.while I open it ,it just blank.
In the other side，when I try to run the main,js in the maze,there's always a problem about the goog.closure.
thanks for anyone’s helps.

[NeilFraser]

I would recommend going through the build process described here:
https://github.com/google/blockly-games/wiki/Build
That will resolve the goog.closure problem, amongst others.