How come? I think it’s decently made, and we’re using one SID for music and a second for the sound effects.
Nothing technical - just sounds awful - terrible composition, very messy and amateurish and not a patch on the original which only uses a single SID. But hey, that's just my opinion, perhaps others will like it.
I usually LOVE SID music, but music like this I would be turning off immediately and putting up with sound effects, again, just my personal opinion.
On a more positive note, the game looks and runs nicely and I am sure it will be greatly appreciated by new Mega65 owners (mine arrived yesterday ;) ).
All the best,
a