DungeonSweeper is a slick, simple Minesweeper-style RPG. Instead of mines, you discover chests, monsters or the exit. When you find the exit, you're forced to move to the next grid even if you still had areas to clear on the previous one. There's no real strategy except perhaps trying to find all the chests first, so you get the upgrades they offer, such as armour and weapon points, and refilling your hit points. When you click on a monster you instantly fight it, and usually win, but may lose hp. When you lose, it's instadeath and back to the start.
MineSweeper's most ingenious feature is its colour coding. Red means there is a monster around that square. Yellow denotes a chest, and blue an exit stairway. If there's more than one thing to discover, the game mixes the colours: orange for a chest+monster, purple for a stair+monster, white for all three. I haven't yet found a stair+chest, so no clue what colour that ends up as. For a free game, it's a nice little time waster.