ToolTypes (program icon):

 - PUBSCREEN (def=default pubscreen, name of public screen to use for "window"
mode)
 - FULLSCREEN (def=windowed, can be toggled ingame with alt-return)
 - DEPTH (16/32, def=32, only applies to fullscreen)
 - CHANNELS (def=4, amount of audio "channels" to use)
 - REFRESH (def=as set in Prefs/GUI, SIMPLE/SMART)

Playing:

1. Doubleclick the icon to run the game.

2. Select "New Game" and then try to save your city by destroying the incoming
missile waves. Also try not to let your cannons get destroyed as they are your
only defensive capability against the missiles. All buildings still intact at
the end of a "wave" add to your score (no buildings left => game over).

The hiscores are saved in a file called "hiscores.bin". If this file does not
exist yet it is created by the game. To clear out the hiscores just delete the
file.

Note: The game requires a P96 hicolour (16-bit) or truecolor (24/32-bit)
screenmode. The display code won't work for a palettemapped or non-P96 screen.
The "FULLSCREEN" option above can be used to force the game to open it's own
screen, which should be OK.

Changes:

0.9:
 - fixed bug that would cause antimissiles with no x-velocity to continue
forever,
   without exploding
 - doubled the amount of possible incoming missile angles (was 4 previously, now
8)
 - doubled the reload time of cannons from 1s to 2s
 - changed the gfx (if anyone thinks he can do better please contact me
(fredrik()a500.org), the game can use either colormapped or 32-bit (i.e. with
8-bit alpha), image format doesn't matter as long as it's supported by
datatypes, .png or .ilbm preferred though)
 - tweaked sky gradient a little
 - removed ugly looking fog
0.8:
 - scoring system now implemented
 - missiles now target buildings (launches are not completely random as before)
 - missiles get progressively harder now (faster, more accurate, less delay
between launches, etc.) 
 - support for more than one channel in audio routines
 - player now has only a limited amount of "cannons" with a fixed reload time
(2s) with which to combat the incoming missiles
0.7:
 - some more gradients in menu
 - proper shading on buttons, etc.
 - hiscore display (not functional)
 - new icon
0.6:
 - added some nice gradients (sky, menu buttons)
 - some other improvements
0.5:
 - backdrop image
 - some small gfx/speed optimisations
 - nicer looking menus
0.4:
 - optimised pre-clearing of the drawbuffer (reduced ingame cpu usage by about
40%)
 - added some primitive sound code (uses AHI hi-level interface)
0.3:
 - too many to mention
 - added proper "main menu", and removed the gadtools ones
 - ESC while playing now goes back to the main menu.
 - "Pause" button (keyboard) pauses the game
0.2:
 - added possibility to destory the enemy missiles
 - fixed quite a few DSIs (didn't show up until now)
 - added PUBSCREEN setting
0.1:
 - first release