Game slowdown on laptops

1

In need of some enlightenment -
I’ve recently completed a Flash game, hovering at about 400k - It works fine on desktop machines, however lower processor laptops experience severe slowdown when playing the game;

  1. the game is 100% vector graphics
  2. dimensions are 500 x 350, @ 24 fps (for fluidity of gameplay)
  3. made use of some custom colors (non-web shades)
  4. key frame usage is limited, mostly tweens

I’m not sure if one, all, or none of these aspects could be at fault for my situation, but any input is greatly appreciated.
Thanks again