About TopStack
In TopStack you control a mining robot and destroy blocks to gain points.
There are new blocks falling from above, so you have to keep your eyes open to not get crushed by them.
You can leave the current stage at almost any point in the game, and by proceeding to the next stage the overall layout as well as the speed at which new blocks appear will change. You can also stay in any stage as long as you like to maximize the amount of points to get out of the stage.