1.6 update

In this update I corrected a couple of issues, one rather big and one small:

The first and most important was a bug where the "ku" character would display instead of the "nu" character; essentially, I just accidentally attached the wrong sprite to the object. Not sure how that happened, but it's fixed now!

The second and far smaller issue was that the error message displayed when an unrecognized command was typed in now disappears whenever the player starts typing again, instead of just after one second (it will still disappear after 1 second if nothing is typed).