Weekly drop #9: some map refinements

The messy middle of the project! Incremental updates this week:

•  Added a few more derelict buildings and machines
• Improved distribution of sprites on the map (better spacing to avoid alpha depth sorting issues)
• Camera move to show where a road is revealed.

For some reason, the itch.io web player seems to open a window now, instead of running the app embedded. I'll have to find out if there's anything I can do about that.