Interesting. Not so much the content, but what to say about it.
You have a selection of stunning photos, which make a reasonable slideshow. You could ask 20 people about the diagonal wipe transition and get 20 differnt opinions so I won't go there apart from to say it was inoffensive and unlikely to upset anyone too much!
But I get the impression you realsied that a straight slideshow would be rather repetitive and hence people would switch off, so to liven it up you put in some stuff from a particle generator - which looked very good.
But it's clearly here to act as a break in the sequence of photos, nothing else. It had no real bearing on the slideshow and adds nothing to the video.
By rights I should be concluding that it was a pointless interruption of the slideshow - but I actually quite enjoyed it. I liked the breathing space it gave me betwen the images and I enjoyed the particle generator videos. So, I want to slag it off because it shouldn't work, and in some ways it doesn't, but it kept me watching and interested - which are the main criterea for a successful film.
And it worked well for the music.
I think that's a thumbs up from me?