This seems rather easy, doesn't it? You just move up a few tiles, turn right, shoot, turn left, move up a bit more and you're done. Well yes, the solution is fairly obvious from where we're standing, but put yourself in the body of that little robot and try to see the world from his perspective. Each turn is a new set of parameters for him to process and his view of the world is very limited. You might see the target behind that wall over there, but all he sees is the