Simple Number Game! Free

There's also full version of this app (Simple Number Game!) which includes slightly bigger grids and no advertising!

Full version: https://itunes.apple.com/app/id1069629092

Simple Number Game starts with empty grid and the goal is to fill the grid with ascending numbers starting from 1.

The rules are very simple:
To place a number horizontally or vertically, you must leave two squares between the consecutive numbers. To place a number diagonally, you must leave one square between the consecutive numbers.

Features:
– The game shows possible locations for the next number. This feature can be turned off.
– Size of the grid is editable. Grid sizes for different devices are shown on the table below.
– The game keeps record of solved grids.