Lvl 15. A1 is left bottom. Laser device i6 facing left. ball dropper on b9, d8, f8 transporter bot on h3, h5 must go to the left. Laser detectors G1 heading left, and b8 d9 f9 must heading right. Then the mirrors. A1,A8,C8,E9,G9 and H6 , H8, you must find out urself which way, because i want to make you use your brain:P:P