Sonic 2 Adventure Control is a ROM hack that probably introduces new gameplay mechanics or features not present in the original. The 'Adventure' tag suggests a more explorative or open-ended experience compared to the linear levels of the original game.  Gameplay could be impacted with the inclusion of new items, enemies, or special abilities. The core mechanics of the original Sonic 2 are likely present, but it should offer a modified or extended gameplay experience. This game was made by the ROM hacking community, not by Sega or Sonic Team.

Sonic 2 Adventure Control

Sonic 2 - Sonic 1 Style