Escaping maze

This is a first person action shooting game,Players are surrounded by zombies,Players are free to explore the surrounding area,Players can kill zombies or avoid zombie attacks and survive as long as possible.
Control keys:
Right-click targeting
WASD movement
The left Shift running
Left mouse button attack
Space leaping
The left Ctrl squats
Mouse control direction
R Loaded Weapons
G the bomb
F Pick up weapon
Middle mouse button switch weapons