of course it made sense. if i play a game i want to beat the game before i try anything else on the game. and i dont have any fun if i never ever win on a game. and the fact that a.c.e. dissallows you to add additional credits to metal slug its the only way to beat the game by coming back and trying the same spot in the game over adn over and over and over and over and over again untill i manage to get by it. then come back later and do it again after i've beaten the game.