okay guys, quick question.

i'm currently working on this game which requires the player to shoot down objects that hits the screen with the mouse cursor. these obstacles will increase in size gradually (from the distance) before it comes in 'contact' with the screen, so as to give the illusion of distance.

problem is, how do i decrease the speed of the obstacles travelling towards the player? so that he will have more time to shoot 'em down / react before they actually hit the screen.

thanks!