Problem
After Herbert launches, you see a blank level (no walls or buttons). At top right Herbert says: Level 0.
Solution
This is by design. The first time it is launched, Herbert starts on level 0, which is a practice level free of buttons or obtacles. To get to the other levels, press the down arrow on the scroll bar on the right side of the main window.
Note: The tutorial version only has level 0.
We hope that this resolved the problem for you. If it did not, please contact us.