Alright.
You asked... I'm not a piano player but I have been playing and listening with music for enough years to have a good ear for how something should go. You finished this piece with an opening for a really good solo sort of section where you drop the pitch and make a really dark powerful rolling set of keystrokes. Keep that going and build it, build it, build it into a really powerful crescendo of feeling from the heart then suddenly drop it down to something slower and closer to start, vary the dynamics a bit more and then finish on a hanging not. It'll leave the listeners feeling the mood of the song afterwards if done properly. Now give us what ya got.