Some of the red squares are holding mines. Your goal is to mark such squares. You have to look wisely to the numbers.
Each number on the square indicates the amount of mines around it.
If there’s only one red square- It means that the mine is right there
Right click with your mouse to mark it as mines.
Clicking the number reveals all neighboring squares, but only if the amount of flags around it is the same.
You’ll win if all the marks are placed correctly or all empty squares are opened.