A shoot-'em-up game with horizontal scrolling. You have to surive (possibly blasting) multiple waves of aliens before facing the boss and completing the level. Complete all levels to win.
Its peculiarity is a resource management screen added before each level (including the first one). You have a limited amount of cash to buy your ships, their weapons and accessories (there were a good number of them to choose). Will you opt for several ships ("lives") with poor fire abilites and no extras, for a single super-improved ship or for an intermediate solution? which kind of satellite do you get? which super weapon (only one allowed)? Such questions added an unusual (for the genre) aspect to the game.