Sniper Strike TD - Shooting War

It's an awesome fast-paced shooting game!
A gang of extremely dangerous enemy troops are going to capture your base.
You,as a elite sniper soldier to protect your army base from the attacking enemy troops.
Take your weapon and shoot down the approaching enemies in various fighting area to survive.
The enemy has a strong firepower, land soldiers,amphibious tanks and aircraft etc.
Upgrade your guns,stop the attack from the land and air enemies.
Are you ready for it?