Click left of a row to double all numbers in that row.
Click above a column to decrease all numbers in that column by 1.
When all numbers in a column are the same, the column is complete.
The goal is to complete every column.
Suggestions for Beginners:
Start with smaller grids and lower "Max Number" values.
Once you are comfortable with the rules, try to increase grid size and number magnitude gradually.
Think about the grid as a whole. The value of a square cannot exceed 100,000, so think about ways to manage the value of individual squares.
Look for ways to eliminate numerical diversity from a column. If every number in a column is either a or b, and a > b, then this column can be completed with no more than one doubling per row, as long as b > a - b.