In the US version of Bubble Bobble Revolution, there is a bug on level 30 that prevents the boss from appearing. Since you need to defeat the boss to move on, you can't do anything. You're just stuck there forever until you turn it off. OTHER BUGS IN THE GAME: Level 5 - No enemies. Go straight to level 6 within a few seconds Level 19 - Once again, no enemies. Go to level 20 within a few seconds Level 20 - The boss is at least there, but all he does is move back and forth. But he's stuck between two platforms, so he can't do anything and is just stuck until you shoot him to death. Level 21 - Similar to Levels 5 and 19. Enemies appear, but they all just die randomly and you go to level 22. Level 23 - Same as level 21, but this time not all of the enemies die. Level 26 - Same as level 23. Level 28 - No enemies. Go to level 29. Level 30 - No boss. Game Broken.