Vastly inspired by Minesweeper and the concept of Sandpiles (Abelian sandpile model).

You are presented with a grid of values. You're able to add values to the cells (sand piles) of the grid , but as soon as the value of a cell reaches its maximum, the cell topples, spreading everything it contained to the adjacent cells. If, however, the cell is located at the border of the grid, some of its value will be forever lost in the abyss of nothingness. As more sand gets gone, the grid will become smaller and smaller, until you eventually...

... run out of space.

Try to get as much score as possible.