There's a snail and a hole in each level. Kick that snail into the hole. Then your pants will change into another color.
Yes.
In Fancy Pants 2, the Pants have no power. They just look good on your character. Well, I don't have all the pants so I'm not an expert.
Arrow keys.up= open doordown=duck;crouchleft=run to the leftright=run to the rightS key= jump
It's the same as Fancy Pants world 1 you use the letter "S" on your keyboard