Do not flap too much and hit the top pipes. The bird accelerates as it falls. To counter this, do not flap too much to regain altitude. A single flap will always stop your descent no matter how close to the bottom you get. Tap when you are low to reach the exact height needed to just get past the hole. If you tap too soon, you will hit the top pipe. Allow the bird to fall and tap just before it hits the bottom pipe. Try to keep the bird as close as possible to the middle of the screen to make both descents and quick ascents possible.