Played a few games of Mario 35 yesterday. Its fun, and I am pleased with my mid range finishes. The early game is a little slow. You will be playing 1-1 and 1-2 a lot, with the 1-3 and 1-4 thrown in. And its still fun, with levels that give you challenges (stares at 1-3). But once more levels start opening up, things start getting crazy. 3-1 is the start. Hammer Bros are insane. And once you start getting the later enemies into the mix more, like Lakitu, Spiny, Beedle, and Bullet Bill, things get insane.
I do wonder if Hammer Bowser is a separate enemy...