Alright, my turn.
Not a bad start, but man, some of those chords in the intro very nearly turned me off. See if you can get closer to the original chords if you need to.
Now, for the things you asked The Damned that I may be able to help you with.
The drums:
You can make real sounding drums using white noise. It's all about how you EQ and mix it. This site has been my holy grail for EQing, and there are many others like it out there. If a particular drum isn't quite working for you, add another on top of it to achieve the sound you're looking for.
May I also add that drums are nice, but are only half the equation. You need bass, drums or not. There's something of a tenor in your song in the form of a cello, but you need bass. Every ensemble and genre of musical instrument has a bass instrument (tuba, contrabass, bass flute, etc.) for a reason: it acts like a foundation for your music to sit on.
I've heard songs without bass, and I got to tell you, they may work, but they're empty.
To the other thing you asked The Damned:
No to the increasing flute volume. Fade out the other instruments just enough to make the flute stand out, but not overpowering. If given a choice, decrease, not increase. Well, I mean if you start off soft, yeah, but if you're going from forte to piano, ensemble to solo, don't increase.