To the right you see a number of pieces, each consisting of up to seven bricks in a circle. The goal of the game is to use these pieces to form solid circles of only one color. When such a circle is formed, it's removed from the playfield. The level is completed when the playfield is empty and there are no more pieces left.
To place a piece on the playfield, simply point with the mouse where you want to put it and press the left mouse button. To rotate a piece before you place it, press the right mouse button.
You should be able to form a solid green circle without too much trouble. Good luck!"