So I totally agree with all the comments about your wrists. Seeing your positioning made my hands hurt too! But I realize there seems to be little you can do about it in terms of moving. However, I do have one suggestion on that front…I wonder if you could find like a keyboard wrist pad somewhere, and improvise a way to attach it to the front of the keyboard? It might give your wrists at least a little bit more support, and you won't have to aggravate your other condition. It may take some creativity, but just a thought. After all, you want to be able to keep playing keyboard, right?

On the music itself…well, this isn't really my favorite track from PSIV. But your arrangement and performance here is quite good. If I had to make one criticism, I'd say the lower chord is a bit too heavy sometimes, considering the character of the original track. But otherwise, you definitely put some more character into a track I found a little on the bland side myself.