Thanks for playing! It definitely is possible to add a dash or a space for folks that don't want to use all the letters. I will add that to my bug list and I'll fix it in the next version.
Thanks again for playing! Exquisite Bytes. I've updated Picofender to allow you to enter a couple of other characters for the high score, including underscore "_" which should give you something like two characters. Hopefully this is a satisfactory fix for you.
