Quadronica Lite

Remove Blocks Game is a funny game, its rules are very simple, but to get high score is difficult also.
the main rules are:
1> mark rectangles' corners of the same colors, and the blocks in the rectangles will be removed. more blocks are removed, more score can get.
2> initial time is 60s,remove one rectangle, the time will be added 4s, and a wrong touch will decrease 2s.the game will over if time is finished.