Changes
  CleanUp:
    all copy protection code removed
    duplicate code removed
    garbage code/tabs removed
    circle code removed
  .hbu000.
    misc changes
  .hbu001.
    new level/demo/edit coloring
  .hbu002.
    demo sound and reorg
  .hbu003.
    demo speed up
  .hbu004.
    demo sprite new colr/new color reset
  .hbu005.
    demo level handling modified
    more garbage removed at the end of the new moves
  .hbu006.
    enemy rebirth colors adapted
  .hbu007.
    victory message
    level time output after finishing level
  .hbu008.
    make images editable
  .hbu009.
    edit command 't' - edit level success message
    edit cursor keys
    edit flip level/curor past min/max borders
    edit command 'A' to reload level
    P to play previous level
  .hbu010.
    new highscore format/coloring
  .hbu011.
    new editor commands
      s - show high score
      S - init high scores
      x - swap two levels
  .hbu012.
    new game command
      M - mirror level
  .hbu013.
    change lr start flicker
  .hbu014.
    new game command
      Z - toggle random level mode
  .hbu015.
    character digits
  .hbu016.
    up to 128 hidden ladders
  .hbu017.
    expert mode (after game pause and f7)
    to write selected levels to disk 9 from game play
    drive 9 must be available
    
    X to xmit actual level
    ctrl+G to collect all the missing gold
    + now: set next xmit level
    - now: set previous xmit level
  .hbu018.
    top scorer on title screen
  .hbu019.
    loose collected level score on death
  .hbu020.
    end game after passing max level
    add victory message
  .hbu021.
    jump 10 level forth/back with <commodore> plus u/p
    inc lives counter by 10  with <commodore> plus f
  .hbu022.
    display editor messages in message line
  .hbu023.
    edit command 'T' - test edited level directly
    Q - return to editor
  .hbu024.
    edit moves with joystick
  .hbu025.
    enemy rebirth/corrected in case of hidden ladder display (enemy lost)
    no enemy rebirth if already occupied by another reborn enemy
    ShowExitLadders shortened
  .hbu026.
    enemy rebirth animation brushed up
