My character can't see it. o.o I explored the bottom part of the screen but there was no door. I also did the ctrl+mouse scroller to zoom out but it didn't zoom out the game. 
Seems like a resolution issue, which would be my bad. I should have designed it better for browser. Not sure how else to help but maybe reload the page and try playing without touching the zoom, keep it at 100%. The door is also right underneath where the broom is, and Nutmeg (The cat on the bed) keeps it locked until you talk to her. Hope this helps!