You can configure different element help text here.
(The entries below are default and therefore commented out.)

custom_133: Blue Sliders - pushable by the player
custom_141: Gray sliders - not pushable, starts to move by a kick of another stone 
custom_190: Green stone - deadly and twice as fast as the player. Lure him into a hole.
custom_123: Hole for blue and gray sliders, player can fall in 
custom_93:  Border tube - target for blue silders to make a good score
custom_122: Yellow rebound wall - changes to a hole by a special hit
custom_132: Green rebound wall - grows out of holes, which just have swallowed green stones
custom_230: Detonator - collectible and droppable, destroys other elements
custom_177: Deflectors change the direction of the sliders

