What I have problems with is not creating the platform but getting the player to detect the platform and move with it. Pixel-detection can detect, but not cause the player to move with the platform.
The best way I can come up with is to use a combination of pixel testing and looping through all the objects to move the player, but is there a better way?

You have to loop through all the objects to see which ones are touching the player

That still doesn't move the player along with it, though...

Maybe store the movement of the object in a temporary variable, then just before moving the object check if the object's close enough to the player, and if so add its movement to that of the player as well?