It is a mobile friendly game.

 

Just use your mouse/finger to drag the bird and eliminate all your enemies.

Press Q to skip the current level.

Press E to gain 5 extra ammos.

There are 2 ways to eliminate enemies: Make obstacles falling on their head or make the bird touch them.

Enemies will leave their bodies so just pay attention to the enemies with opened-eyes.

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There are 10 levels in total.

Good luck!