Did you deliver all the letters (even if you got them wrong)? After delivering them all and talking to Mrs Bell a cutscene should play out. If you did all these steps and still couldn't progress then I'll see if our programmer can find out what's wrong!
Viewing post in Lost in Bloom (Demo) jam comments
I delivered all the letters on the first floor. On the second floor, I learned that it's my apartment, an empty apartment, and Mrs. Bell's apartment. I didn't deliver any letters on that floor. Then I went to talk to Mrs. Bell. I hit spacebar, but she didn't say anything, and I couldn't move past her. Nothing happens after that.