Summary: A fantastic twitch puzzler in the tilt-the-board tradition of Marble Madness and Super Monkey Ball (as guitarexplosion mentions), with fresh and enjoyable twists to the formula. There're lots of (quite varied) levels, and even though simply completing them all won't take long, the replay value is...
Summary: A really enjoyable small game. You have to know that this is really a small game but it's well executed. The puzzles are fun and the controls tight. It's fun to compete with the online leaderboards.
Summary: Great puzzle game at a good price. The object is to guide a blob of mercury through various mazes of uneven ground, surprise holes, color dependent areas, and magnets. The game is designed to make use of your favorite music, although the soundtrack provided is not horrible.
Summary: Brilliant little game: Stumbled across this by accident and after the trial paid the $5 to upgrade - It's a great game you can just zone out in front of for a few hours and chase high-scores. Great value for money and really polished.
Summary: Imagine Your favorite marble maze game (ex. Super Monkey Ball, Marble Madness). Now imagine that with a blob of thick liquid. Although the main game could be beat in a measly 2 hours, there is many bonus levels and things for the perfectionist to keep playing. And at 5 bucks, this is a steal.