Oh boy, my first review.
My first impressions by the screenshots aren't very nice. Why are the "windows" like that? If they're supposed to be broken windows, it looks unappealing. I'm not really impressed from the level itself, either. I like the concept that you've chosen, but you didn't create it well. The level is pretty flat and pretty bland. You should place some more BGOs, but don't use the SMB3 columns, because
this will happen. Not sure why it happens, but I think it happens because some backgrounds appear in front of others, I'm not sure. with some other BGOs as well, so always test your level just in case.
Another thing I didn't like is that the whoooole level is just about stomping enemies. You can also easily fly over most of the obstacles because of the Tanooki Suit at the start. Make the level more fun and unique, try adding more obstacles, not just enemies. At the outside section, there's a
blind jump at the end of the platform trail. A line of coins would've been nice to indicate you have to stay on the platform, or just don't make the platform fall at all. Thankfully I avoided death thanks to the Tanooki Suit, but some people might fall for that. The third section was as boring as the first one. The enemies are pretty repetitive, another column cut-off. Overall, the level isn't very good and it needs a lot of editing before it's worth playing.