I love this game! I used to play it on an old 80s computer when I was a young'un.
Very creative use of the original game drum samples. Overall, the texture sounds full, all the parts make sense and I love it!
Although I can't at this stage dish out any helpful advice, I'll tell you this: please post another WIP soon. You're the man Zolborn.
In fact, you might just have inspired me to open up an old PoP remix I started ages ago...
Best of luck.