BURST THE BALLOON (aka. Balloons)
by Rob Smith
from Popular Computing Weekly, 15-21 September 1983

THIS PROGRAM NEEDS ISSUE 2 EMULATION BECAUSE OF ITS USE OF IN TO SCAN K/BD

This is an amusing game for either machine. The game starts with a small
introduction, a balloon rising up to a dart and bursting. The introduction
also shows you the control keys, and tells you that by pressing two keys at
once you can move diagonally. This is done by using the function IN to
control movement. The BORDER and PAPER colours are POKEd in, rather than
entered from BASIC, to avoid any risk of interfering with IN (lines 40-50).

The object of the game is to steer a dart so that it bursts the balloon
which appears in random positions on the screen, and to do so in the
shortest time possible. To make things harder, every so often the balloon
shifts to a new position. At the end of the game the Spectrum will give
you a report on how well you played. Do not be offended if it is rude to
you at first; you will soon get better.

If you find the game too hard you can change line 720 to read:
 720 IF a/30<>INT (a/30) THEN GO TO 390
My high score is 100.


Variables
high = high score
p    = vertical co-ordinate for dart
p1   = horizontal co-ordinate for dart
p2   = vertical co-ordinate to delete dart
p3   = horizontal co-ordinate to delete dart
a$   = dart
lives= time/25
a    = time counted
b    = vertical co-ordinate for balloon
c    = horizontal co-ordinate for balloon
r$   = report


Graphics
Line 210 - graphic E
Line 220 - graphic A
Line 250 - graphic C,E,D,B
Line 480 - graphic I
Line 490 - graphic H
Line 500 - graphic G
Line 510 - graphic F