Awesome game! Even though the graphics don't look like a NES game to me, the gameplay is very NES-like. And having played a couple of NES Beat 'em ups in the past, finding out that I can interact with objects, go into the corridors and enter rooms blew my mind.
I also found one buddy who died almost immediately to one of the nurses. Great mechanic, though.
One thing that is a bit harsh is having only 3 lives, that's something I do not miss about the NES era. But this time it worked on me, I want to beat the game, so I will save it for later.