Adapted from

Tables and Stools
By Jordan Irwin
http://opengameart.org/content/tables-and-stools
http://creativecommons.org/licenses/by/3.0/

Roguelike Dungeon/World Tiles
by Joe Williamson (@JoeCreates)
https://opengameart.org/content/roguelike-dungeonworld-tiles
http://creativecommons.org/licenses/by-sa/3.0/