Flappy Flying: custom game

Flappy flying is game where you can control a bird to avoid obstacles.
In this game you need not only to avoid obstacles, but also to catch bonuses that reduce or increase the weight of the bird. But don’t overdo it, as a very light or very fat bird is difficult to control. You also need to be careful, as the bird's speed increases over time.
You can also replace the game sprites with your own and play in your own style, specify the maximum acceleration of the bird in the range from 1 to 99 as well.