PlusOne - a number grid puzzle

This is a very addictive puzzle. The rules are simple and easy to learn.

- When you hold down a tile you can see how the nearby tiles will change. Your goal is to make the lower board exactly like the top one

- When you click one of the tiles you add 1 to the numbers of the nearby tiles (up, down, left, right).

- The number of the clicked tile doesn't change!

. When you complete the level you can proceed to the next one.

- The game difficulty increases according to the level.

- You must try to reach as high level as possible.

- If you login you can compare your result with other players.

Enjoy!