Simple Number Game!

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.
– Undo your previous moves by swiping left on the screen.

Grid sizes for different devices:
– iPhone 4S: From 5x5 to 9x11
– iPhone 5/5S: From 5x5 to 9x14
– iPhone 6/6S: From 5x5 to 11x18
– iPhone 6/6S Plus: From 5x5 to 12x19
– iPad 2/Air/Air 2/Retina: From 5x5 to 22x27
– iPad Pro: From 5x5 to 29x37