They're already more than 2x funded (granted, they only were looking for $100), with still 29 days to go.
From the campaign:
The Dark Castle Tile Set is a printable PDF that includes a big variety of halls and rooms to make a great dungeon for RPG's or other Dungeon crawling adventure games.
Inspired by retro video games I took a slightly different approach to the gritty realistic tiles that are often offered. These are all hand designed graphics that are meant to inspire the fun of those classic themes.