Thanks! I'm glad you enjoyed it. The mirrors are basically the Unity water system with the ripples turned off. I believe I used this, and modified it slightly for my needs. The mirrors did end up causing some performance issues because each one is effectively a whole other camera rendering the game, so when you get more than a couple all active at the same time they can cause the occasional framerate drop. I tried to keep that to a minimum with some careful design and by turning the mirror reflections off when not needed/noticeable but there are a couple of small areas where sacrifices were made for the sake of the puzzle designs. Since it's not a fast paced game I deemed that an acceptable compromise for the most part. I now realise why everyone uses lasers instead of reflected light beams for this sort of thing! So much simpler.