Marble Legend is a casual game very similar to Zuma where you have to destroy all the colored balls coming at you in a labyrinth by shooting balls of the same color at them from the center of the labyrinth itself.
Each of the 50+ levels included in Marble Legend has a unique design: both the outline of the labyrinth as well as its background will change. And in each you'll always have the same goal: destroy all the colored balls before they reach the end of the maze or you lose the game.
To destroy them, as usual in puzzle games of this sort, you'll have to put together three balls of the same color. As you destroy chains of consecutive colors you can also do 'combos' that will let you get a lot more points. You'll also have special balls that give you devastating powers such as a ray to destroy balls directly.
Marble Legend is a simple and fun game that's ideal for killing time. It doesn't have particularly complex gameplay nor especially good graphics, yet it does what it aims to do: keep you entertained while you kill 5 or 10 minutes.