Zip to the finish
Each player is trying to get all of there gems to stop on the goal. To do this you need to build up walls and utilize your opponents gems as well as your own to slide into the goal.
Each turn you are laying new terrain or sliding a gem. The gems need walls or other gems to stop them, otherwise they keep moving until they hit a wall or another gem.
The game is simple enough for a novice but has strategy that will keep you coming back to it.