The art and music ooze cyberpunk vibes
The shop mechanics are a lil confusing, not sure if there's a button to check your current inventory, but I felt like I was just randomly clicking NPCs until I sold something
Echoing what others have said about the hover + key press feeling awkward. Maybe consider either just having it be a mouse click (since you're hovering anyways) or just keep it to a key press if you want it to be proximity-based.
One last thing, I might've run into a bug in the level generation, because the first room I spawned in the Ghost Zone was completely walled in w/ no corridors connecting to other rooms, so I was soft-locked.