I finally checked it out today and really enjoyed it, but I couldn't figure out how to solve the bit towards the end with the goldfish. I looked at the hints but I could only think of one other object that glows, and moving that to the fish, and moving the fish to that, didn't seem to do anything.
I'd look up a walkthrough if I could but all the ones I could find were either from an older version that doesn't seem to be the same at that part, or the walkthrough is only for a small section I already cleared.