Tip: If you give a Muncher tile custom graphics, it will still act like a coin when a silver P-switch is active, whether it looks like a coin or not. So make sure to use ExAnimation if there's a silver P-switch in the area.
Man I had no idea complex music like this was possible to port into SMW. This is too good! I had to compare it to the original version, and it seems like some echo effects and background synths are notably missing, but it's impressive how close this is to the original. I'm guessing the samples were recreated from scratch? The percussion samples sound a little different, but the lead synth sounds ripped from the original song.