Small fixes to workspace code in level.py
Small fixes to workspace code in level.py

Fixes #480

mikebryant/rapid-router,mikebryant/rapid-router,CelineBoudier/rapid-router,CelineBoudier/rapid-router,mikebryant/rapid-router,CelineBoudier/rapid-router,CelineBoudier/rapid-router,mikebryant/rapid-router