Finally got round to giving this a go. Was quite enjoyable. I actually wasted a lot of time in the lower part of the facility cos I couldn't unlock the door despite me picking up a pair of keys on a nearby barrel...not realizing I needed to do the eye puzzle for the actual key. XD
Would certainly play the complete game if that ever saw the light of day. And also, it's a small comfort to know that we might all be able to do something like this if we follow your tutorials. More than a few times, I had a "Oh I remember him explaining how to do this" moments while I played this.