I'm not usually a fan of very long water exposures, but here the effect is surreal, and I find it draws me in; it looks like light pouring down the hill, not water. I want to go and play in the light. Nice shot.
The composition seems a bit right heavy to me. Since the people are over there, and the falls "go" that way, it seems like it might be better to crop some off of the left and have more in the right side of the frame
OK so your Waldos were not too hard to find, but so what. This is a good shot and your capture of the cascading water is fantastic. Unfortunately at the top of the falls there is a red line running to the right of the water which is very off putting. Really think that it might have been worth cropping down bewlow that to remove it (appreciating that this would have made you Waldos bigger)