It was interesting playing as the villain, don't see that in many indie games - felt like a prologue to this maniacal doctor's narrative, and would be interested in seeing part 2 in the restaurant, but did feel very 'samey' with regards to what was going on.
Think this type of game would benefit with a type of 'suspicion' system, where through dialogue the patients have the option to become suspicious of the main character, and can ultimately cause a game over or multiple endings/branching dialogue if they guess his intent. Also could use other mechanics like mini-games to counter their accusations, etc.