Here are some cheats and tips for the game Bubble Bobble.
Cheat mode:
Press [Left] [Right] [Up] [Down] [Left] [Right] [Up] [Down]
at the main menu with the “Start”, “Options”, and “Quit”
options. Then, press one of the following keys during game
play to activate the corresponding cheat function.
Effect Key
Level skip [F3]
Player one extra life [F4]
Player one unlimited lives [F5]
Jump to level 98 [F6]