Hey, I graduated a month ago, so here's some feedback from recent graduate to recent graduate
I'd say this is a really good reel.
-Do try and show your work as fast as possible. Don't spend so long showing a name, people lose interest really fast.
-Timing and staging are really important aspects of VFX, try and show some of that to the viewer.
-Unless you are a good sound fx artist, DON'T add sfx to your demo reel, it will undercut the perceived quality of your work.
-Subtle music might be a good extra to make the reel feel polished, but I don't think it is a necessity.
-When showing shaders, maybe show some different variations on the shader rather then showing different colors. Shaders tend to be open enough to allow quick iterations
I'd say, good luck finding a job, but I'm pretty sure you'll find one in no time