Try to form tetrads (four-piece groups) out of the falling pieces in this action puzzle game. But remember - only four pieces per group!

• "Down":"Move Piece Left"
• "Right":"Move Piece Left"
• "fire":"na"
• "M":"Move Piece Left"
• "jump":"na"
• "P":"Move Piece Left"
• "S":"Move Piece Left"
• "R":"Move Piece Left"
• "Left":"Move Piece Left"
• "movement":"arrow"

Click with mouse on Start to begin the game. Make tetrads to destroy them. If you create gray blocks, destroy tetrads next to them to erode them.