The game field consists of 3 parts:
- the side part (bottom, top, left, right)
- the main board
- two next blocks

Setting Hard is count of colors.
Setting Level is count of initial blocks on the board.
Setting Size is size of the board.

In the begining you will get random placed blocks on the main board. You may click on blocks from the side part. It is the only kind of your activity. A clicked block may start moving across the central zone until it meets another block on its way. THis kind of blocks has an arrow indicating the direction of the movement. When an another block is removed on the way, the block continues moving in the same direction. If 3 or more blocks of the same color are gathered together (diagonal contact is not valid) they explode and the player gaines points.
When the central zone is emptied, the player gaines Hard*Level points and game generates a new set of initial blocks.
The game continues while the player is able to make moves.