A SPOILER FOR THOSE WHO ARE HAVING DIFFICULTY WITH THE MECHANICS OF THE GAME:
Like a traditional text adventure game, you have to type commands using the keyboard. But unlike a traditional text adventure, you can only type certain letters, and those letters can only be typed a certain number of times. The numbers at the bottom of the screen indicate how times you can type each letter. A zero under a letter means you can't use that letter at all. (Unless, of course, you happen to find a way to collect more letters...)
A SPOILER FOR THOSE WHO ARE HAVING DIFFICULTY WITH THE MECHANICS OF THE GAME: Like a traditional text adventure game, you have to type commands using the keyboard. But unlike a traditional text adventure, you can only type certain letters, and those letters can only be typed a certain number of times. The numbers at the bottom of the screen indicate how times you can type each letter. A zero under a letter means you can't use that letter at all. (Unless, of course, you happen to find a way to collect more letters...)