Basic Impementation

gistfile1.txt

class Player

  MAX_X = 3
  MAX_Y = 3
  DIRECTIONS = []

  def errors
    @errors
  end

  def initialize
    @x = 0
    @y = 0
    @errors = nil
  end

  def current_position
    [@x, @y]
  end

  def move_left
    if @x == -MAX_X
      @errors = "eek too far left!"
    else
      @x -= 1
    end
  end

  def move_right
    if @x == MAX_X
      @errors = "eek too far right!"
    else
      @x += 1
    end
  end

  def move_up
    if @y == MAX_Y
      @errors = "eek too far up!"
    else
      @y += 1
    end
  end

  def move_down
    if @y == -MAX_Y
      @errors = "eek too far up!"
    else
      @y -= 1
    end
  end

  def reset
    @x = 0
    @y = 0
    @errors = nil
  end
end

player = Player.new
while true
  puts "You're currently at #{player.current_position}."
  puts "How would you like to move?"
  move = gets.chomp
  player.send(move)
  puts player.errors if player.errors
end