First Hard Surface on Zbrush

FMHeart

Hi all, that's my first try to do some hard surfaces directly on zbrush. Concept is totally random then I used the zsphere retopology technique, I worked with 4r4 version so no Panel Loops (which I see is a lot useful).
I need to improve a lot with the software so critiques are more than welcome.

OctoKube

looks cool, i would maybe think of the functionality of it all a bit and made small changes, for example, the tube leading to the shoulder pad might look better gong into the backpack thing .

FMHeart

hey thank you yeah those tubes makes no sense actually, I put them there to fill a hole on the shoulder..