improved
--------
* a quit game function has been added.

* the colour scroll through the game
  logo at the game title page has been
  completely rewritten, because the
  original one looked ugly (badly timed
  sprite movement) and moreover showed
  some broken sprite-pieces.

* there were several flickering dots at
  various locations in the game, at the
  game title page, at the highscore page
  and at the highscore entry page. these
  dots were especially visible when
  using a commodore 128 computer.

debugged
--------
* on some commodores the game started
  automatically and was permanently
  auto-firing without you having
  pressed the fire button at all.

* an android, if shot when falling from
  a destroyed planter, actually gave you
  550 points. according to the documents
  and the on-screen information it is
  supposed to give you 500 points then.

* a "phantom shot" was fired sometimes
  after you pressed the fire button to
  start the game, after you lost a life
  and after you completed an attack
  wave (when firing shortly beforehand).

additional notes
----------------
if you select a starting wave other
than 1 and you want to keep that same
starting wave, you will have to end the
game using [f1] and [q]. once all lives
are lost, the starting wave is
reset to 1.

the keyboard routine of the game
sometimes leads to unwanted results.
for example, if you are moving the

the keyboard routine of the game
sometimes leads to unwanted results.
for example, if you are moving the
joystick to the left and press the [c]
key (or if you are moving the joystick
to the right and press the [b] key or
if you are holding down the fire button
and press the [m] key) a strata bomb
will be released instead of the cloak
being activated. the reason for this is
that the game works with the joystick in
port two ($dc00) and several other keys
($dc01) at the same time. the best way
to circumvent this little inconvenience
is to keep the joystick in the centre
position (without pressing the fire
button) before pressing a key on
the keyboard.

while playing a game (especially when
you select the trainers concerning the
blue men) then sometimes there might be
an additional blue man on the screen.
this particularly comes to the eye when
you already have eight blue men inside
the moonbase and there is a ninth or
even a tenth blue man left on the
planet's surface. however, this is not
a bug, it's a feature. we analysed the
collision routine and there is a random
routine ($1aa8 - $1ab5) which sometimes
exits the collision routine leaving an
extra blue man on the planet's surface.
as a matter of fact this extra blue
man does not prevent the game from
exiting an attack wave (even if it
is the last object left) and thus
we kept it like this.