Just fill grid by shapes from blocks to destroy all full lines, both vertically or horizontally.
Than more lines destroyed, more points You will receive! So strategy will be helpfull.
-A color of blocks is not important
-You can rotate shapes
-You can cancel last step if you did mistake!
-Use second touch for cancel
Also You can select one of two types of control:
1. Draw shapes on grid
2. Drag shapes to grid