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READ THESE INSTRUCTIONS IF YOU NEED DIRECTIONS FOR TESTING THIS GAME IN A ZX81 EMULATOR!
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HOW TO RUN THIS GAME
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1. Download and install a ZX81 emulator. I recommend "EightyOne0.43c.zip"
available from:

   http://wos.meulie.net/pub/sinclair/emulators/pc/windows/EightyOne0.43c.zip

2. Start the ZX81 emulator, select menu option "File"/"Load Snapshot", then
choose file "10CAVEADV.z81"

3. You will see the program listing on screen, and command 'RUN' will be already
appearing at the bottom of screen. To execute the game, press ENTER

4. The game will describe your first location as "YOU ARE IN A CAVE". Now type
your command, then press ENTER. You won't be able to type very fast, but that's
how the ZX81 always works, don't blame me! =:)

5. If you either win or loose the game, it will stop. To play again, type R
(command 'RUN' will appear on screen), then press ENTER

6. You will be able to type faster if you put ZX81 in FAST mode, although it
will make the screen glitch at every key pressed. To enable FAST mode, after
you win or loose a game, hold SHIFT key while pressing F (command 'FAST' will 
appear on screen), then press ENTER. Afterwards restart the game according to 
step 5 above.


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HOW TO LIST THIS GAME
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7. After you win or loose a game, type L (command 'LIST' will appear on screen),
then press ENTER. You will see a listing of the first few lines of this game.

8. This time, type L (command 'LIST' will appear on screen), then type 6
(command 'LIST 6' will appear), then press ENTER. You will see a listing of the
remaining lines of this game.

9. The entire program listing is also available as both text and screenshot
image, for your convenience.


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HOW TO COUNT LINE LENGTHS IN THIS GAME
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It doesn't matter. Each program line is under the 120 characters limit,
regardless if you count keystrokes for typing these lines, or number of
characters that appear on screen. Notice there are no hidden control codes or
initialization either.

This game only uses a machine code routine from the ZX81 ROM (accessed using
"USR 3086") to scroll text on screen, because the ZX81 doesn't provide support
for automatic text scrolling.
