I don't know particularly much about music theory. It's been very difficult to figure out a way to reward good play. I'd like to make this game into something but I'm not sure where to take it.
Here is an image of the current state of the game.
C,V,B,N,M - play sounds
(hold) left shift - higher octave
(hold) left control - lower octave
For now, I think I'll focus my attention to the top down version of Deep Rising (but with fire).
Perhaps I'll give this instrument another go.