Interesting idea, looks really promising (it's cool that you have a plan for final version). Controls are smooth, comfortable to play.
It was kind of difficult to understand what to do at first, but I got the idea of patrol by rounds and catching the intruder. Also I've found a flashlight, but only after I read comment on the game page. And I didn't understand what to do with events (when camera moves on interesting objects). I guess there are more controls than I've found) It would be nice to have the list of controls somethere.
Even with simple graphics it's atmospheric. Wish you luck and waiting for updates)