Crystal’s name will already point you towards the objective of the game which is a fairly simple one: you will have to collect crystals in order to progress through the levels of the game and as you advance the crystals will be harder to collect as they will be located in more remote areas of the map.
However, if you try hard enough you will be able to collect all of the shiny crystals that prepare you for the next level and you will also receive bonuses depending on how well you managed to collect all of the crystals that are in the level.
