The idea is novel, but in reality, the quality of the animation isn't that great.
There's only so far that you can go with an idea like this -
after a while it's just the same thing being repeated.
There wasn't any story or depth to it - and there's a good chance it will stay like that because coins are just too stiff and awkward to animate.
It didn't really excite me or capture my attention much, because it was just the same throughout. Maybe some tense closeups or sound effects would help.
Still, you put some effort into it, and the music you chose was good, so I believe 7 is a fair score to give you.