In this tunnel, you are at a time of crisis.
On the engine,your goal is so simple that kill the most enemies with the fewest bullets,and rescue all the innocent hostages.
Therefore,you have to calculate the rebound route of your bullet to achieve it.
Pay attention to the material of these pillars.
Don't shot the explosive one,otherwise, the hostages and you all will die in this game.
In the end, I will tell you a secret that some of the pillars could rise or drop.
Added ad, fixed bugs