It's insane that we have 90 levels included here, on the NES. Amazing graphics and scope. Unlike the original SMB, this one continues to push new concepts throughout the entire game.
Most of the "puzzle" levels here are tedious and not very fun, but there's only about 4 of them.
This is an amazing time. A genre & console defining title that will continue to amaze for decades to come.

Still a really fun game. However, the limited scope is
noticeable. There is little variety and you soon start to notice that you've seen it all. They will continue to rearrange the same elements throughout the game, but there are no more surprises to be had (except for the "looping" levels).
It's still a fun, quick game, but its shortcomings are more apparent today.