BLOCK ATTRIBUTES

Each  block can have  its  own
properties:

  - Have solid sides
  - Have one way doors
  - Have gravity in one of 
    eight directions
  - Change into another block
    when touched
  - Change into another block
    after a time period
  - Birth a monster
    periodically
  - Be an object


When touched by a character, a
block can increment or  decre-
ment counters for:
 
  - Score
  - Money
  - Hit Points
  - Lives
  - one of 20 other counters