It appears that the module uses some unusual features. I'd suggest reading the "Start Here" document carefully. The yellow Relational Map is the player map. It's not really a combat map, but more of a flowchart map. The location map seems to be for just marking down where NPCs are? At any rate, it seems to be more for GM use. The art style looks to be an interpretation of a CRT display similar to those in use when the Alien movie was first made, and is almost certainly intentional. I haven't played the module, but it looks to be a Theater of the Mind sort of game, with the maps used for pacing the adventure. The Compendium (out of game) has the rulebook laid out in a read-through format. Also, if Roll20 has a Twitch game of the system, it might be a helpful idea to skim through that.