This game develops speed of a response of the player on continuous change of a situation. The rules of this game depend on a selected level of complexity. The objective of the game is the clearing of a field from placed on a field, and falling from above, multi-coloured blocks is faster, than the field will be filled. The clearing is carried out by turn of four blocks, made in a framework, so that in one or several directions, (line, the column or diagonal) has become five or more blocks of one colour.
In this case line, column, diagonal or all together will disappear. The deleting of blocks increases your score. The minimum number of deleted blocks depends on a level of complexity.