Knuckle Cracker

Hello,

i have a hard time beating this level, from the alpha sector.
Gorge of the void, from shadowdragon7015.
I destroyed every enemy building but this one.

Spoiler

Creeper.png (https://www.dropbox.com/s/7gcokfuv7y2aqrj/creeper.png?dl=0)

[close]

I don't how to end this thing, or did i miss somthing else.

Thanks for your help in advance.