Letter Ring Puzzle Game

- By tapping the space between the two letters around the circle, you can move the letter at the center of the circle to any place around the circle.

- By placing a '+' between two same letters, you can combine these letters and obtain the next letter in the alphabet.

- When you catch a symmetry in the letter sequences on the circle, you can combine more letters with '+' at once and destroy more letters.

- The number of letters that can be placed around the circle is limited. The game will end when there is no room left around the circle. Therefore, you should aim to combine the letters before the circle is completely filled and to continually reduce the number of letters around the circle.

- As you combine the last letter of the alphabet, you win.

- The aim is to complete the puzzle in the shortest time and win the game.