DodgeGame

class DodgeGame
  def initialize
    @position = 0
  end
  def displayWorld
    puts "\r\n\n\n"
    puts "#######################################\r"
    print "#"
    i = 0
    while i < 32
      if @position == i
        print "(^u^)"
      else
        print " "
      end
      i = i + 1
    end
    puts "#\r"
    puts "#                                     #\r"
    puts "#                                     #\r"
    puts "#                                     #\r"
    puts "#                                     #\r"
    puts "#                                     #\r"
    puts "#                                     #\r"
    puts "#######################################\r"
  end
  def moveChar
    key = readLastKey
    if key == 68 and @position > 0
      @position = @position - 1
    elsif key == 67 and @position < 31
      @position = @position + 1
    end
  end
  def gameLoop
    i = 0
    system('stty raw -echo')
    while i < 300
      sleep 0.1
      moveChar
      printWorld
      i = i + 1
    end
    system('stty -raw echo')
  end
end

Run this snippet first

def readLastKey
   char = STDIN.read_nonblock(1).ord rescue nil
   key = char
   while char != nil
      char = STDIN.read_nonblock(1).ord rescue nil
      if char != nil
         key = char
      end
   end
   key
end