This patch removes, and changes, some sections of the early levels (mostly the first third of the game) to give the remaining sections a more focused, linear, and streamlined feel.
Before it, the early levels introduced many concepts right at the start and some even happened simultaneously on the screen. Although it fit with the whole retro "old school game" vibe, it's better to start the game with more "boring" sections with only a single toy to play with at a time. It's not everyone's cup of tea, but it can increase the chance that the player will understand the gameplay and the fighting moves will "click" for them so they'll be equipped to play the game ( Some people did not understand or forgot how to play even after the tutorials and introductions because there seemed to be too much happening ).
There's enough challenge and complicated decisions in the later levels, so the game didn't need to start with all that right away.