I managed to clear the room by defeating the enemies as advised! And it was a great turnaround towards the end...
I was a bit surprised at the end of the game, but I loved the weirdness of the 3D moment at the end of the game.
And now I have started playing Résop Paz Yandere True ( R-pyt Rpyt ) Beta Demo. I will write about my impressions of that one in the "R-pyt Rpyt" section!