This is an old version of the game. A newer (and more challenging) version can be found on a apple app store for iphone and ipad where it can be found under the title "Block Dropper". In time I plan to update this veriosn to match but I'm afraid I haven't done so yet.

Instructions:

• The Left and Right Arrow Keys (or A and D) will move the currently falling block left or right respectively.
• The Down Arrow Key (or S) will cause the current block to fall the rest of the way down immediately.
• Pressing the Escape Key at any time will pause the game.
• Connect four or more blocks of the same color in any shape to remove them and gain points.
• You get one point per block removed.
• Connecting more than four blocks will cause the region around the last block to be removed as well and give you extra points.
• Connecting ten or more blocks will give the normal extra points and clear the screen.
• Clearing the screen will decrease the speed at which the blocks fall.
• Every five matches that you make will increase the speed at which the blocks fall.
• You lose when the blocks reach the top.