Pretty nice! Although I have noticed that the animation of the coins is offset as they're loaded into the level. Just a small thing that doesn't mix well with the default SMW coins which all share the same animation frames at the same time. I'm sure that it all has to do with the coins being animated as sprites rather than blocks.
These are great, but I seem to be having issues when attempting to use them in a level I am working on which uses horizontal level mode 05. ROM clashes whenever the coin sprites get processed by the game. Any clues as to what to do to work around that?