RockRush

Boulderdash is a game that, for whatever reason, has inspired legions of clones over the years. I am not personally a huge fan, but people must enjoy the game since there are so many versions of it available! RockRush is another such game, with some decent graphics which change depending on which "cave" of levels you select. Functionally it works the same as Boulderdash, such that you simply use the arrow keys to move around the mazes, collecting rainbow-colored gems and avoiding getting crushed by the boulders or other traps.