Fly

In this game, you control an airplane. You must try to avoid crashing into the mountains, you keep on flying until you crash into a mountain, the longer you fly, the more points you get. This is one of the simplest games I ever played. May be fun in short bursts, not much replay value, albeit there may be a small incentive to beat your own high score.

While there is not much to it, you must have excellent concentration and reflexes to get a high score. Has excellent landscape graphics (the white caps are what your airplane shouldn't touch).

Worth a download for a quick try.