I love the cave feeling that it gives! A really nice match! I wish I could give you a better feedback, but listening on my phone is not the same. I would have used timpanis to give the song a bit more depth, but it's really good as is, don't change it! Now I feel that brass or strings would be perfect in the rest of the song, don't you agree? I can't wait to hear the full song. I'll give you a proper feedback when I'm home again.I tried another song, I made a beginning at The Colossal Hole from Wario Land 3:
https://clyp.it/jevlnn00
What do you think?
EDIT: Worked some more on it. I think the very second last notes of the marimba and piano sounds odd. they're correct on the sheet but it just sounds off to me. Can't lay my finger on it.
https://drive.google.com/open?id=0ByJDdRadu5z4cnhKb3dhQzYyZ0k