Cheese, stars, candy or flowers still... In games of collection, the hero always have to collect something.
Sometimes, the collected objects are used to fill in a gauge, to treat the heroes or to give him a special power.
It also happens that the collected objects are points added to the score of the game.
Whatever happens, you generally have to collect the maximum amount of objects. There is sometimes a target in the levels to be allowed to pass to the next levels.
If the target is missed, the level must be redone.