Added global inventory (Store items, Take items with you, Sell items)
Added game currency($)
Added item store
Added Game map system
Added New game map
Added New starting game map
Added Name and description of items
Added New icons for items
Added artifacts (items for sale)
Added closed door on a key card of a certain color
Added map instability system
Improved interface

Map data
Energy drink
Flashlight
Key cards
Black sludge (Formed)
Detector (items)
Detector (entities)
Dematerializer
A few artifacts

In general, there were many more changes, but they are not significant.