This is a 16×16px tileset I did for fun some time ago. The idea was to create a set for a 2d science fiction game for cell phones or similar devices.
There are also some bonus objects and characters included.
You might want to use it as it is or add or modify tiles and other stuff.
Every tile, object and character finds itself in its own layer, BUT THEY ARE NOT LAYERED BY THEMSELVES !
You should have the patience on working with pixels if you want to make major modifications to the file.