English:
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(V.1.20h)re-release (3rd of Oct. 2014 and 6th of Oct. 2014)
    -replaced third-party sound effects with selfmade effects
    -put the project under a new LICENSE (MIT and CC BY-SA 4.0)
    -removed mouse range restrictions in menues and game

(V.1.20g)fix
  Development time: about 3 hours (24th Jan. 2010)
    -recompiled using VS2008
    -also runs under Windows 7 now

(V.1.20f)fix
  Development time: one hour (12th Dec. 2007)
  +technical changes:
    -recompiled, using Allegro4.2.2
    -game does not simply crash anymore at startup in case the .DAT file was not loaded successfully
    -also runs under WinXP 64bit now

(V.1.20)Update and Fix
  Development time: another few days (in March 2005)
  +Appearance changes:
    -InGame...uhm..."Music" added
     (don't panic, can be switched off!)
    -Menue-FONT and InGame-FONTs adjusted
    -Mouse support for menues added
    -darkened, discolored titlescreen as Story-,Instructions-,Top10 background
    -InGame background improved (with sidescrolling starfield)
    -Music and SwapStereo options now accessible through the menue
    -DUMB and Allegro logos,homepages integrated on titlescreen
  +Technical changes:
    -rare gameobject(Shot) disappearing BUG resolved
    -incorrect programme-shutdown BUG resolved
    -now using Allegro v4.1.8(wip)(previously v4.0.3)
    -now using DUMB v.0.9.2 for "music"playback

(V.1.10)Gameplay Update and Fix
  Development time: a few days (in March 2005)
  +Gameplay/Appearance changes:
    -new Titlescreen
    -new (better readable) FONT
    -scoring is now also based on difficulty
    -shooting doesn't cost points anymore
    -difficulty is overall and in detail more challenging
    -(you only have one cannon in hard mode)
    -Survivalbonus added
    -Hit-ratio and Accuracybonus added
    -Cannon overheating added
    -difficulty, hit-ratio and reached wave are shown in the Top10
    -silly JOKE MODE added (press j in titlescreen)
  +Technical changes:
    -"alleg40.dll" Technical Note added to manual
    -Taskswitch issue (hopefully) resolved
    -Attackwave+1 BUG at "win game" resolved
    -collisions-inaccuracy resolved
    -Free gameobjects are found faster through QAD-Stacks
    -Swap stereo channels (press s in titlescreen)

(V.1.05)fix
  Development time:  1 day (27/08/2003)
  for fixing the two year old code

(V.1.00)original
  Development time: 11 days (09/21/2001 till 10/01/2001)