Well...sounds good

the loop is creepy as well....doesnt really remind of me of dungeon to be honest. it kinda reminds me of pipes...

anyway, I dont know what to grade you based on what you did in comparison of the original. I usually advise people to make their own stuff from scratch, but thats just me. so i'll just give you an 8.

either way, keep experimenting. and props for the mention of flashkit.com! its the first site where I saw "new" music, considering I had listened to only mainstream music prior. definetly is an inspiration towards me, not that you need to know :P