That's the thing-- every idea this game has is so unique to it. I remember playing the levels in space for the first time and thinking "man, this is rad." It'd be a good candidate for a future game club, honestly. I think there's stuff to talk about here.
So on a whim tonight, I fired up Super Mario Land 2: Six Golden Coins on my 3DS Virtual Console. It's been *years* since I've played the game and I wanted to play something a little different. I had forgotten how much of a quantum leap this game was, in terms of Mario on Game Boy. The visuals are significantly improved from the first Super Mario Land, the mechanics are much deeper, and the level / world map design is much more complex. It's really a very creative game, and it does a lot of things that are pretty unique. I love all the worlds-- they're very different from the kind of worlds you're used to with more "traditional" Mario entries. It's also pretty interesting that the world is so open. Coming from Mario games at the time where the world map was fairly linear, this was one of the first Marios I played where you essentially have your pick of which worlds to do in what order. It would be like playing SMB3 and deciding "I want to tackle the desert world first this time" or playing SMW and saying "let's get the forest of illusion out of the way early." Anyway, I know it's not really the most popular Mario game, but I have a soft spot for this game.