Avoid Hammer - fly forward

This game's goal is for airplane to fly forward avoiding hammer.
There is airplane which fly on the city.
There is hammers waiting on the way too.
Hammer pair collide with each other fast or slowly.
Airplane must avoid these hammers.
There are two arrow buttons on the bottom.
Touch right arrow when you want to fly fast.
Touch left arrow when you want to fly slowly.
Adjust airplane's speed fast or slow and make it not to collide with hammers.
You can have joy of speed and avoiding hammers.
Compare your score with other's in global leaderboard.