Continuing the Game Boy version’s tradition of misnomers, Classic Bubble Bobble isn’t a port of the original arcade game for the Color. Instead, “classic” refers to stripping Bub of his charge bubbles, hover ability, and health points while also eliminating the “stronger” enemies that had to be damaged with bubbles. It’s also more like the “classic” game boy game in that Bub’s sprite is identical to that version along with many of the enemies he encounters.
The only large change in this version is the ability to travel to alternate stages at certain points in the game. After defeating every enemy a door may appear in certain stages. Entering the door places Bub on a different track of stages, while waiting for the door to vanish enables Bub to follow the current track he is on. While this technically provides some replay value, Classic Bubble Bobble’s faults will likely keep players from wanting to explore them all.