Delta Riddle

25 levels of addictive challenge, extremely simple , control, nice visual effects and amazing sounds.rnrnInstructions: Click on the area with two or more similar triangles to remove them.rnrnGoal: remove all trianglesrnrnTIP: make good use of the Undo button, you can avoid it becoming a random click-fest :)rnrnHot keys:rn * U – undorn * I – redorn * R – restart level