One thing

This is a awesome game but I cant find anyone to play with on arena/co-op
And also plz add more turrets and stronger walls
Heres some things I recommend:

Turret you sit in and control

Grenade launcher

Flamethrower

Laser (pierces through enemies)

for turrets:

Grenade launcher

A turret that shoots mini robots that attack

Cacti turret that poisons enemies

Cant think of any more but keep thinking!

SOMEFDGUY about Block Fortress