I know kb, psi, and greatest 335 played super stacker 2, don't know if anyone else tried it. But here's the first version.
http://www.thegamehomepage.com/play/super-stacker/
Here's the second one.
http://www.thegamehomepage.com/play/super-stacker-2/
Don't worry it's much easier then the second one haha. You guys beat any in bonus mode?