I honestly enjoyed this game, very good and also I love the fact you get to see so much during this demo! Graphics are good, the fact you can easily learn which room gives what is also decent. Also the fact that you can damage enemies with cigarettes with right upgrade is amazing!
Only issue is; I don't really know how to be prepared well enough to fight bosses. As you'll see in my gameplay, I did one crucial misplay at the end of the video, but I don't know if it would even matter.
In the end I think it's a bit challenging game; hp is an important resource so using bullets at the beginning is not a bad deal; just make sure to use it efficiently (you won't be able to always finish off the opponent without it damaging you, so you might as well do it with the knife).