UPDATED. Very hard. Challenges: E rank= get 1 big target and at least 10 points, D rank= get both big targets and at least 20 points, C rank= get all teleporters and at least 25 points, B rank= get at least 35 points, A rank= get all teleporters,both big targets, and at least 40 points, S rank= get 50 points.
