According to the storyline of the game, Damiux has dreamed of one of the greatest adventures of your life, avoiding obstacles, walking through abstract and labyrinthic stages and defeating the enemies with specific powers which should be gained during the long way.
To activate a power pressed with the 6 number buttons, for example, the stones are pressed with the 0 button. In the enemies, a Plantcopter for example, it isn't affected by the stones, but if they defeat the fire. And by the way, to get new powers, you must defeat the bosses, and once done, will also move to the next world.
Available the english version: 
