Welcome to Voyage forum

...well, it's about time! ; )

I am enjoying this game, but am a little stuck. I have made it inside the building and went to the right where the one dot one bar is one the floor. I cannot figure out what it is asking me. I see the sketches on the wall, but don't get how those equations relate to the two I can change. I also have a question about the organ. I got the music to play to open the door and when I left and came back I had to open the door with music again, but I was never able to figure out the small key slot looking thing beside the diagram with the moving lights. I noticed these key slots were in the elevator too, but I didn't see how they worked. And lastly, for now, how do I catch the falling plants?

This in one game where I really had to use hints... try Universal Hint System. Just gives hints without spoilers.