I like the current build. However, I do have a suggestion.
The greatest fear is the fear of the unknown. Most horror games therefore are way less scary on playing them the second time. I believe this game has a great opportunity with the arials and their reputation system to create some unknown on subsequent playthroughs by introducing multiple invisible alien factions. They may have a selection of base areas (like the treehouse, a second one might have something different) and different preferences in their reputation systems. Most importantly, the relation between them could be randomised such that the player doesn't know weather the aliens in question are buddys or have beef between each other - thus making it more difficult to correctly guess how the reputation systems interact with each other.