Thanks! Yeah, there is no sound in the game. I hadn't experimented much with sound yet for the genesis/mega drive, so I didn't ever get to adding any. I agree that glass smashing sound effects would have been a good addition.
I used an open source dev kit (SGDK) that makes genesis/mega drive development a lot easier. I think anybody who is comfortable with programming in C can learn to use it, but knowledge of how the hardware works can help a lot.