Final Nestination is the best solution for spending your free time. This is a game that will not let you to get bored. Exciting you with its dynamics, but at the same time, requires constant attention and planning from you. A game where each bird needs your help to get to its native dwelling.
You will want to plan the safe path for each bird and lead them, avoiding them hit each other. And since each of them has its own speed, the definition of trajectories for them is a task that requires high level of skills and concentration. Be aware that the number of birds on the screen will grow with the flow of time.