Sky Hopper

How to play: one button does everything — tap the sky, click, or press Space (or the up arrow) to flap and climb; let go and you fall. Fly through the gaps between the towers without touching them, the ground or the top of the sky. Each gate is a point and a star floating in a gap is five. Every ten gates the gaps close in and the wind speeds up, and the sky turns toward sunset. Thread thirty gates to win.