FIELD! V1.1
Here is a quick update to the original FIELD! Super-Chip Game.
This version has a few new requested features(variable speed).
And some more details (like explosions and stuff.)

New Keys:
The following keys set the speed of the ship.
7 - Slowest speed
8 - A little faster than 7
4 - Good bit faster than 8
5 - Very Fast(Good Luck!)

In case you don't have the original docs:
1 - moves you right by applying thrust to the left.
2 - moves you left by applying thrust to the right.
/ - moves you up
* - moves you down

And as with all CHIP games <- (DROP/CLR/BS) exits to the stack.

You should have guessed by now that "7" no longer stops the current
game and returns to the title screen, you can crash quick enough that 
this is not needed.

There is a small problem, in that the explosion may be drawn in 
the wrong spot if you are too close to the edge of the screen, but
it doesn't last long enough to worry about, and the code needed to
avoid it would make this game needlessly bigger. I think 865 bytes is 
big enough.

- Al Roland
  droland@eng.auburn.edu