The classic minesweeper game where you must search for 20 bombs without clicking on them directly. If bomb(s) are beside the cell you have clicked on, the number shown tells you how many. Use these numbers and logic to deduce where all the bombs are. To make it easier to keep track of locate bombs, put the mouse over a cell you think holds a bomb and press "b" to place a flag on the cell.
inspired by the coding tutorial by the "coding train" youtube channel, that showed how to do this in javascript: - https://www.youtube.com/watch?v=LFU5ZlrR21E