We're team of 2 people, Bondhan (https://www.artstation.com/aobond) and Rhangga (https://www.artstation.com/fractalife).
The arrangement is Bondhan will do modular/tiling parts and Rhangga will do hero assets/ all things that are unique. None of us have extensive experience with Unity so we'll see how it goes!
Best of luck to everyone!
Everything below is WIP and subject to changes
WIP #2.7 Added better pillar shape, added pipe sets. also trying some colour. No textures yet
WIP #2.6 Worked a little bit more on the corridor. Ball on second image will be similar to the original concept on the contest briefing (with roots wrapping it) - at the moment it's just a placeholder :)
WIP #2.5 guardian update by Rhangga, unfortunately not much changed on the envi side due to GDC crunch on my side
WIP#2 Replacing more placeholder boxes with proper assets