Mr. Do!'s Castle

arcade platformer game for Commodore 64, 1984

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Mr. Do!'s Castle is an action platform game which has you in a castle
consisting of several floors, each of which contain a variety of blocks. You
control Mr. Do! the clown who has a hammer which can be used to knock out the
blocks in the floor. Wandering throughout the castle are deadly unicorns
which are constantly trying to catch you. Your goal is to earn as many points
as possible and to progress through the increasingly difficult castles.

There are two ways to complete a castle; you can either destroy all of the
deadly unicorns by crushing them with blocks, or you can knock out all of the
blocks which have a cherry symbol on them. In addition to the cherry blocks,
there are three blocks with a key. If all three key blocks are knocked out,
the door on the roof of the castle unlocks. If you make it to the door, all
of the unicorns will temporarily become harmless and will contain a letter.
If you hit a letter unicorn, you will earn a letter in the word EXTRA. Spell
the complete word, and you will earn an extra life.

The last type of block you'll encounter has a skull on it. If you knock out
two skull blocks, all of the blocks between them will also be knocked out and
replaced with a bridge. As the castles progress, the castle layout will
become trickier and the unicorns become faster and more numerous.

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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)
         [F10] - toggle performance meter
         [F11] - toggle fullscreen mode
  [ScrollLock] - quick switch control ports
    [PageDown] - make a screenshot (320x200)