This game is a bootleg/hack of "N.Y. Captor
The game is much harder and lives settings are different than in N.Y. Captor:
You can't get any extra life.
You lose a life as soon as you get hit by an enemy or when you shoot at an innocent.
Shooting birds kills you instead of recovering 3 'steps' of damage !
The game hangs after bonus stage (level 4) instead of looping back to level 1 with higher difficulty.
The game also frezees sometimes for some unknown reasons.