2048 Fibonacci: 2584 Use arrow keys to slide the tiles in that direction. Slam two titles with the same number together to combine them. Try to get to 2584, or simply see how high you can get. Classic 2584: Press Space to Start. It's your regular, everyday game of 2048 Fibonacci, also called 2584! Random Mode: Press R to Start. It's like classic, except that the new tiles can be any tile! Smaller tiles have a greater chance of appearing than larger tiles. Reverse Mode: Press B to Start. It's like classic, except that you start with 10946 and numbers get smaller when you combine them! Perhaps there's a way to make them disappear in this mode...