Fairy Lands: Rinka and the Fairy Gems

Some fairies managed to learn how to use them as a weapon, so fights will be less painful. But not all of them have mastered this art. To be exact - neither of our six heroes can use those mysterious stones in big barrages. This... might give you some problems. But c'mon, since when were heroes stronger that their foes? (Please, don't say it in front of Skootis.)

Back to gems! Weird thing about them - when two of the same color collide, they go "ding" and release some weird spheres. Those spheres can absorb other gems! Red spheres, for example, absorb all red gems, they meet, but will stop after absorbing any gem that isn't red. The same happens with others, mostly-maybe! ('^' )

If gems will touch left side of your screen, you'll get hurt! Does it makes sense? What are "screens"?