The 3D modeling of the characters is well done. The pathing of the NPCs feels really polished; the robots move from room to room and spot to spot very naturally (except when there's a lockdown and they press against the closed doors - I think I saw one get pushed by another robot and clip through the door).
Lack of any audio was disappointing, especially since it could've added a lot to this particular style of game. For example, it would have been nice if you could figure out where the last kill happened because you heard a robot death noise in the distance somewhere.