World B contains one difference in Super Mario Bros. The Lost Levels. Instead of green Super Springs, you will find red Springs that only launch you into the air for a very short time. This will likely change your progress.
Watch out! If you wait under a hidden block to stomp a Koopa, you'll jump with less height than you expected.
Hit the block above the first pipe to reveal a vine that leads to coin heaven C. However, only a super-sized character will be able to punch a hole in the brick in order to reach the vine before it scrolls off the screen.
A trio of hidden blocks in the gapped row of bricks make for a solid platform when they materialize.
Hit the "?" block on the far right and jump when the Power-Up Mushroom flies.
Instead of stomping the pair of Koopa Paratroopas in this section, you should target the pulleyed platforms for a better chance to advance.
Pop the "?" block as you ride the sliding platform in the middle of this section, and grab the Power-Up Mushroom before it drops. Then, secure your footing on the platform or the block and jump to the next challenge.
If your character is super-sized at the end of this section, hit the bricks quickly to clear away one and make a Fire Flower appear in the other. However, you need to collect the coin above the power-up block before hitting the brick itself. Otherwise, the power-up won't appear, yet the block is still emptied.
You can catch the Fire-Bar guarded Power-Up if you're fast. But if you're already super-sized, it won't do you much good.
In Super Mario All-Stars, the right side of the pipe in Part A is sealed in, so you are in no danger of over-jumping and falling into the lava pit right beside it.
Riding the sliding platform at the very beginning of this section is the only way across the gap. If your hero is super-sized, he'll have to duck in order to squeeze under the bricks.