Stackle:

Stackle is a cool physics-based puzzle game where your objective is to place blocks and make it as high as possible. You have to take blocks from below and place above the white line and grow it bigger. The game will be over if the blocks from above the white line falls below the line. Use your mouse to click on a block below to grab it and then place over the line by left clicking. You have to place the blocks carefully and do not destabilize the bottom. You will earn points for correct placing of the blocks. You will get double scores for placing stared blocks.