First choose the game difficulty, and then operate the role reasonably, shooting the crow that flies in the sky.
How to operate ？
A – GO LEFT
D – GO RIGHT
W – GO FORWARD
S – GO BACKWARD
SPACE – SHOOT
ESC – PAUSE GAME
UP – INCREASE GUNNING ANGLE
DOWN – REDUCE GUNNING ANGLE
LEFT- ROTATE ROLE TO LEFT
RIGHT- ROTATE ROLE TO RIGHT
Game difficulty
EASY — The birds fly very slowly
NORMAL — The birds fly at normal speed
HARD – The birds fly very fast
