Very nice! , but i think a few things need adjusting, you could perhaps make the bottom left imagine black and white so its similar to the one on the right. I like the angles you used for overlaying the photos at the bottom. I think the green and purple you used work very nicely aswell, especially the touch of green in the top left image, which you could maybe use in the other one aswell.
I like it, but I think you should fill up a lil more of the pure psycadelic void with psycadelic bands/people