Bazooka Blitzkrieg

Debug Menu
Near the end of the first bank of ROM (offset in an unheadered ROM) is a flag which enables a debug mode when set to, either by using a hex editor or Pro Action Replay code.

After setting the flag to, press A + B + Start on Controller 1 during gameplay to bring up the debug menu.

After exiting the debug menu, a new game starts with the selected settings, beginning with this aim adjustment screen which is more minimal than the one normally seen in game. The bright blue background was likely used to maximize the accuracy of the Super Scope.