Reduced difficulty in several levels of world 7 :
[list]
[*] 7-7 -> Reduced speed & max velocity of directional boxes.
[*] 7-8 -> Reduced number of steps by 1 and moves some platforms a bit.
[*] 7-10 -> Added a 'checkpoint' on the middle of the level.
[*] 7-12 -> Tweaked mass & velocity of boxes.
[/list]