Indeed, it is very Kingdom Hearts-y. BUT! That does not mean it isn't original and awesome! I greatly enjoyed it. I've always liked the "orchestrated with a heavy piano input with a darker tone" theme. I think this is really really amazing and I can visualize so much amazing stuff to go along with it in my mind.
You have a great talent for bringing some awesome imagery through musical means. 5/5 across the board from me. :D
Please contact me if you would like to use this in a project. We can discuss the details.