Buckle up! Don't lose your direction! Stay focused!
Follow your instincts while you control the dragon - to aviate the green dragon to avoid crashin' on walls of the tunnel. Learn to fly by heart, rather than depending on your eyes and your mind.
Colours of walls keep changing once you've travelled far, far from the begining. Hold your breath while you're bout to swerve thru corners and avoid any faults of hitting those walls. You gotta be fast, real fast than the heartbeat:p