6561 is implemented in Python and uses Tkinter as the GUI framework.
6561 is a new variation of the well-known game, 2048.
The goal is to create 6561, a power of 3.
6561 starts with two 3's in a 3x3 grid. When a user moves the cells using arrow-keys, the grid adds 3 with 60% probability, and adds 1 with 40% probability. 1 is introduced as an obstacle to make the game a bit more challenging, because 1 can't be combined with power of 3.
Probability is set in this way to manage the difficulty of the game. You may modify the probability to make 6561 even harder!
Without having to quit and restart the entire GUI, the player is also allowed to restart the game by simply pressing R.