There are two endings, one is just a different way to fail. You can escape the house if you do a series of actions (the order does not really matter, outside of the time spent). You have 60 seconds to repeat this sequence and slowly find more and more to find the way outside. If you can not find the ending, I recommend playing on the simplyfied difficulty, and just walk around the house and see what you can interact with.
I was not going to give hints, but here: Go to the couch (sofa), move it, search it as well, behind the couch is a window, interact with it. Use the coin you find in the couch on the vent in the bathroom. I will not say more, hopefully the window will tell you exactly what you need to do to progress