Collect eggs for bonus points and Land carefully and upright on nests to complete levels.
The Nest Landing Aid (on by default) will show you when you are moving too fast to land by fading out the nests. Slow your approach down and they will Fade in again. It's up to you to land vertically on your feet. Tilted more than a few degrees, sideways on, or headfirst will not work and you will crash. This game is fairly unique. If you don't read the instructions please at least take note of the How To Land On A Nest splash screen on level 1 and read the sign posts on level 1 & 2.