Move LetterWorm around the screen collecting letters in the right
order to spell the word shown.
There are different levels, with LetterWorm moving faster at each
level and with more letters to choose from.
As LetterWorm moves, its body become longer.
If LetterWorm hits the side of the screen or another part of its body,
you begin again at level 1.
After you unzip, open the folder and run the exe file.