To beat beat level 15 (2 Tall Towers) on Super Stacker 2: build a tower on the right or left with cubes and then put the triangle on top of the tower (http://puu.sh/1PRgG), and then do the same thing for the other side. The end result should look like this (http://puu.sh/1PRhr)
 "PSI232"){kind=small}
 "hankzekrom"){kind=small}
 "TheGoodLife67"){kind=small}
 "DoctorSandvich"){kind=small}