Take everything wrong with Mega Man 1 and 2 on the NES and you get this. Your fired shots travel WAY TOO SLOW on the Game Boy, and these stages, especially the Fortress and Space Station at the end of the game, are NEARLY IMPOSSIBLE! Plus if you lose in either you have to start over, and that means if you die at the end of the Fortress, at the hands of a Robot Leader, you have to fight the whole way back to them, and any you beat must be beaten again.