Okay! I've fixed the crash on the 6th floor and the resizing bug. Thanks for your bug reports.
I also tweaked the camera so you stay more in the center of the screen.
Also, 1d4 is a notation used in a lot of tabletop roleplaying games. It refers to multi-sided dice where the number before the 'd' is the number of dice to roll and the number after it is the number of sides each die should have. Therefore 1d4 means "one four-sided die" (which gives a value between 1 and 4).
Enemies not being able to walk through open doors is probably a bug, but we'll pretend that they're just really afraid of doors for now, how's that? :)
For the screenshots, open a File explorer and try typing %appdata%/LOVE/neilmakesgames-dungeon-of-flowers into the address bar and see if that takes you to a folder with the screenshots. (Note that it won't work on a bugged screen like the one you posted on imgur with all the errors.)