Level art environment for Polycount Monthly noob challenge

Level art environment for Polycount Monthly noob challenge.My main goal was create runtime stylized environment using as much tech art tricks as possible for good perfomance at mobile devices with good framerate(more than 30fps).
Demo, which shown in video ,can run in budget Android5 device( 4Core MediaTek 1.30 ГГц with Mali T720 ~ 60$ price)