Control
Tap as quickly as possible when you have at least three obstacles in a row. If you are too slow, your character may hit them before they even go up. You must be precise and take your time after a longer series of obstacles. Tapping too soon will result in it hitting you when it comes back down. Do not be distracted by the score. Focus only on your route and obstacles.
Diamonds
Ignore the diamonds, as they are only distractions. Instead, focus on the obstacles and how they are placed. Develop a strategy to avoid them. Diamonds will collected automatically as you progress.