Three mafia birds enter into your nest and they demand acorns, lots of acorns: if you don't comply with their demands, something terrible might happen to you. Of course you don't want this to happen and you're all alone, so you go in search, even if you must defy lots of dangers, like thorns and snakes. Try to pick up fifteen acorns or more: you'll see that this is quite a challenge, because before you realize, you've hit another thorn and lost a life! That's why you should absolutely grab all the hearts: this increases you chances. The controls require a delicate touch: move slowly and carefully, then you have the best chance to pick up all acorns within the number of lives you have!
Use the arrow keys or WASD to move around.