2048 X2 Merge Blocks

This new twist on the classic game combines Tetris with 2048. As the numbers fall from the sky, they keep decreasing. Merging numbers is a way to ensure a level playing field. Tap on the columns to drop the numbers. To create new numbers, connect two or more numbers from the same type. Combining multiple numbers can create higher multiples. Which is the best way to combine these two numbers?