The name of the stacker game online is I believe to be is Super Stacker. Its very easy at first but then gets harder. It's still fun though! Here is the best selection on where to find it. Just copy and paste this address below.
This is Super Stacker 2 but erase the 2 if you want the 1st one.
Website Address: http://www.addictinggames.com/superstacker2.html
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