Simplicity is, perhaps, the major selling point of this game. It is fairly ugly and amateurish, but it works nicely. There are much nicer-looking minesweeper-type games like Dangerous Mines that have exceptional graphics, sound effects, and a variety of games. They are not free, however.

None beat an old OS 7 game whose name I cannot remember. It had levels of difficulty and progressive play--level after level, with increasing difficulty. The puzzles were NOT rectangular, for the most part. You had multiple lives and could earn lives through scoring and bonuses. (It was NOT Manic Minefields, which had teenager-style graphics.)