Towers

There are 4 Turret towers in the game, green, blue, yellow and red, all four for different players. There is currently 5 floors and a basement for each tower.

Once a player claimed a tower, he will be able to start the first wave of monsters. Once the Monster Gate on Floor 1 is opened, monsters will start coming out of a portal, heading towards your tower. Killing one will give you $40 but if you don't, the monsters will keep heading forward then eventually retreating back to the portal. To Start, You must buy the Mineral Pipe (Floor 1) to Build your First Conveyor and "dropper"

Basement
the car is the only useful part about this, it is almost useless.

Floor 1
This floor has droppers, nothing else.

Floor 2
This floor has some droppers but nothing that much.

Floor 3
It has a weapon shop and a HUGE turret that does 220.

Floor 4
A new weapon shop and a shield generator and speed upgrade

Floor 5
This floor has a boss to fight, if you don't understand, then click Money/Currency and scroll down to monsters.