Tiles are the solid 'floors' that can be found in N. They come in a variety of shapes. They are solid, and can stop enemies. If the ninja falls on one from too high, he can be killed. They can divert the paths of Drones, thwumps, and floorguards. Tiles are the most commonly used item in N mapmaking.
http://4.forumer.com/uploads/nformation/post-16-1154996208.png
To the left is a picture of all the different tiles in Ned. They are (from top to bottom, left to right)"E" tiles, "1" tiles, "2" tiles, "3" tiles, "4" tiles, "5" tiles, "6" tiles, "7" tiles, and "8" tiles. Blank spaces are also known as "D" tiles.