Boppin

From the main menu :
[Ctrl] [V] - Slide show of all episodes
(Use arrow keys and [Esc])
[Ctrl] [T] - sound testing dialogue
During gameplay :
[Ctrl] [B] - display the mystery spot
[Ctrl] [L] - moves you to the next level, costs a life
[Shift] [Ctrl] [L] - moves you back a level
During gameplay, the following are available provided the password
"TOYS" is given to activate them. (Registered version only)
[ctrl] [F] - go to the final battle for the episode
[alt] [H] - delivers one maximum hit during the final battle
[ctrl] [F5] - add one credit to player one (nine maximum)
[ctrl] [F8] - add one credit to player two (nine maximum)
[1] or [!] - set lives for player one to zero
[2] or [@] - set lives for player two to zero
In v1.1 of Boppin, the command line parameter "blood" may
be used to access the violence mode from v1.0. (Information from Cheat Machine)