This looks like a fantastic hack. I definitely can't wait to see more. Here's some suggestions, though. 1: The CNZ underwater palette doesn't really look underwater to me. It actually looks more like a "lights out" palette to me. I'd say use the current underwater palette for the "lights out" one, and get rid of the underwater sections altogether. 2: Maybe change the tan-ish tiles in MGZ to something else? Perhaps red or green (although if it was green, then there'd be a tad bit too much green). I'd experiment with this a little, as it doesn't look too much different from the original. That's not to say it needs to absolutely changed- I actually love the way MGZ looks now, but if there's a way to make it look even better, why not? 3: I like all the music reworks, except for Launch Base's. I never thought that it should really go any faster, it just doesn't sound right. Experiment with this a little, I'm sure there's something you can do (as Ice Cap sounds great). 4: I'd suggest making the background theme of Launch Base more of a sunset-y look. This might require some additional artwork, but it'd look pretty much fantastic if you could pull it off right. 5: Mushroom Hill Zone looks utterly FANTASTIC. Not really a suggestion, but I felt it was necessary to say :D. Also, that FBZ palette looks great. Is it going to be a night time zone? That'd be pretty interesting (as also suggested).