Brick physics
In the NES version, Mario bounces back very quickly after breaking a brick block. When Mario jumps and breaks a brick in
All-Stars, he is pulled upward for a split second. Unfortunately, this small change wrecks the rhythm of the original game; in
All-Stars, instead of rebounding off a brick block without losing speed, when Mario makes a running jump and breaks a brick that is connected to another block, he'll bump into the adjacent block and fall straight down, resulting in a total loss of momentum.
This change affects both
Super Mario Bros. and
Super Mario Bros.: The Lost Levels, but
Super Mario Bros. 3 was spared, thankfully.
There's actually a
fix patch for this change ..what's pretty cool