game.rb

require 'io/console'

x, y, guy = 1, 1, '(^u^)'
gs = guy.size

world = ['####################']
10.times { world << '#' + ' ' * 18 + '#' }
world << world[0]
world[y][x, gs] = guy

loop do
  print `clear`
  puts world
  world[y][x, gs] = ' ' * gs

  case c = STDIN.getch
  when ?q; break
  when ?w; y -= 1
  when ?a; x -= 1
  when ?s; y += 1
  when ?d; x += 1
  end

  world[y][x, gs] = guy
end