No CFJs yet, but some problems with Space Alert:
1) Only objects In Space should be warped and disappear due to
invalid position.
2) The Shuttle shouldn't always exist, it should be created at the
start of a journey after all objects In Space are destroyed.
3) The Reload buttons should be defined as shutting off when "either
the Engine Room has zero charges or the <other room> has four
charges".
Consider this map: @-->*---@
4) If a threat fails to enter play at position 4 because it's
occupied, does it instead enter play at 1 or 5?
5) If the shuttle moves 2 to the right and the object simultaneously
moves 1 to the right, and they have identical HP and explosion
value and survive the 2-damage-each, then which way does each move?
