The Traveling Fox

Hi! I’ve tried the new version, but I got this:

$ ./thetravelingfox 
:11-10-2017 18:20:26 ShowBase(warning): Unable to open 'onscreen' window.
Traceback (most recent call last):
  File "main.py", line 535, in <module>
  File "main.py", line 96, in __init__
  File "/home/fireclaw/Workspace/the-traveling-fox/the-traveling-fox-game/trunk/build/__whl_cache__/panda3d-1.10.0.dev1210+deployng.117-cp35-cp35m-manylinux1_x86_64.whl/direct/showbase/ShowBase.py", line 276, in __init__
  File "/home/fireclaw/Workspace/the-traveling-fox/the-traveling-fox-game/trunk/build/__whl_cache__/panda3d-1.10.0.dev1210+deployng.117-cp35-cp35m-manylinux1_x86_64.whl/direct/showbase/ShowBase.py", line 925, in openDefaultWindow
  File "/home/fireclaw/Workspace/the-traveling-fox/the-traveling-fox-game/trunk/build/__whl_cache__/panda3d-1.10.0.dev1210+deployng.117-cp35-cp35m-manylinux1_x86_64.whl/direct/showbase/ShowBase.py", line 961, in openMainWindow
  File "/home/fireclaw/Workspace/the-traveling-fox/the-traveling-fox-game/trunk/build/__whl_cache__/panda3d-1.10.0.dev1210+deployng.117-cp35-cp35m-manylinux1_x86_64.whl/direct/showbase/ShowBase.py", line 710, in openWindow
Exception: Could not open window.