The demo has been updated to fix various bugs.
V 0.4.12
UI:
Fixed a bug where the quick torch buttons was not working properly.
Fixed a bug where a saved host could not be deleted.
Networking:
Fixed a bug where hosting a game from the client would result in some connections not connecting.
Other:
Fixed a bug where replacing a tile with no objects on it might crash the game.
Fixed a bug where replacing a tile with active objects would show the wrong object sprite.