Hello!
I didn't really like it, indeed your transitions aren't clean enough, too rough, you don't care about the change of colors when you cut or make masks etc.
Also a really important point, why are you using all those strong transitions in the first calm part and then just slowering down a looot when the song gets stronger? Try to follow the pace of the song better
And yeah be careful about blending frames/ghost frames (because of a bad managing of the FPS)
Good luck