The thing that irks me is you keep saying you can't change things
I SHALL BASH YOUR DEMO!
Issue 1: I liked how the first demo was without the drums in the beginning. They're too much. You introduced enough instruments in the first to carry it. The most you could get away with tastefully is hand percussion on the two and four until the chorus kicks in (IMHO).
Issue 2: I think you could seat the vocals better. The music isn't loud enough for me. The piano should be fuller and the vocals should gently ride on top (key word gently).
Watch that distorted drum sample thing, it could get old fast.
I think you're a talented songwriter and you should invest in a cheap interface like the presonus inspire, hook your Korg up to it, program a click track and lay down the tracks individually so you have a tweakable whole set up. That way you can edit things how you'd like and have a great surface to mix on.
-Greggo