[zell12]

Why would you have tiles above the player, I don't understand. Only way that would be useful is for going through a door, under a wall.

Anyway, you can edit each tile in some options and set them, like:

You enter the options, then you see a tileset image, and you click the tile you want to edit. Big X through a tile means it blocks; Big circle through a tile means it doesn't block; arrow or some other symbol shows it above the player.

RPGMaker uses this concept for thier program.