Click a bomb from the selecteable area, then place it on the grid. Clear the stage by setting off one bomb and creating a chain reaction.
Place the bombs in the right spot to make all bombs in the field explode.
Do not blast any green crosses and make sure that all switches are green in the end.
Bombs will explode in different directions depending on the type.
You can place bombs on top of each other to combine them.
Two bombs or more of the same type will make it extra strong.
Two bombs of different type will combine into a bomb that explodes in all directions.