Some people do not like the images for the tiles and wish to change them. This can easily be done.
1. Open the game and load which tileset you wish to change.
2. Open the folder where the game's data is stored (This is something like C:\Users\***\AppData\Roaming\TileTyper).
3. Replace the images with the name corresponding to the tileset you wish to change (The filenames must stay the same including the .png).
4. Try and load the tileset.
This should change the images of the tiles and make the game more enjoyable for you to play.