Jack Attack
arcade game for Commodore 64, 1983

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This is a simple action game where your aim is to crush 8 spinning heads in
each level. This can be done by either jumping on them or pushing blocks on
them. While the first level is pretty basic with just a few blocks to move,
later levels feature platforms and water, which is fatal to the character.
Besides water, the spinning heads themselves are the main threat as they can
kill Jack by jumping on him. Jack can push blocks on the water which will
then float, allowing him to walk on them.
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Some useful keyboard shortcuts
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[PAUSE] - stop/continue game
[F9] - quick load game state
[F12] - quick save game state (still stored after leaving the site)
[F11] - toggle fullscreen mode
[ScrollLock] - quick switch control ports
[PageDown] - make a screenshot (320x200)