Whether this game is possible or not depends on how well you can simulate gravity mechanics in Flash.
It’s like Tetris with gravity. Blocks fall from the sky and you can push them left/right as they fall. You have to balance them on top of each other to build as high a wall as possible. Whether the wall collapses dependas on the center of gravity of each block and how they are stacked.
At the start of the game the blocks are all square but as you advance their shapes become more irregular.
In 2-player mode you can choose to move the blocks onto your opponents wall to unbalance it.
If you decide to use this idea could you please put a link to LoseTheGame.com somewhere in the intro/credits and email us at mail@losethegame.com thanks 