|The copyright says 1981 instead of 1982
|The title screen starts with a light green
mushroom field instead of a white one, however it then
cycles between various colors. The spider also
|The first level has purple
mushrooms, a blue centipede, and blue lives counters
while the released version has green mushrooms, a red
centipede, and red lives counters.
|The level colors change each time you die.
In the released version they stay the same and don't
change until you finish the level.
|The centipede always appears in the center of
the screen instead of right of center
|The centipede is always
complete with no extra segments no matter the
level. In the released version the centipede
becomes more fragmented each new level and has extra
individual segments that appear on the left side of the
|The scorpion and spider appear more
often and the spider is far more aggressive than in the