OMG！OMG！
The ghosts are so close to me
You have to build turret to attack them
Combine low-level turrets first
Move the high-level turret to the monster gathered area
Choose the turret position carefully
Turrets will fire every time you move or combine them
A little carelessness, they can move to the grid right in front of you
Think twice before moving every time
See how many stages you can survive