Added blue/red alternating colours to obstacles to make them easier to see.

Edited runs to generate half the amount of obstacles, but twice as fast.

Added a score multiplier! Pass adjacent to obstacles to increase your multiplier. If you get hit or don't pass adjacent to an obstacle, it resets to 1.

New GUI using NGUI.

Moved next level text to the top to make room for new UI.

Tweaked difficulty - should now ramp up slower.

Fixed speed not resetting when you restart the game.

Fixed obstacles sometimes not appearing when you restart the game.