All of them seem to be very open, I’m not sure if this is intentional for a game mechanic but I think it would look nicer if it had more complex structures instead of pillars. I like the style though, the buildings look great. You could also add a roomba factory map or a sci fi city one.
Smart! (If you havn’t already, I suggest having the walls a little bit more closer towards the middle, as a half floating roomba would still be kinda awkward XD)
Really depends on how big the model and hitbox actually is tho