Sorry for not posting any new stuff, but I was basically just trying out some objects.
I know there's still plenty of time, but it seems, I'm already done. However I'll wait until I submit my entry just in case I manage to create something I like more.
The base spider object is a free model. I loaded it in 3ds Max and applied the hair and fur modifier, converted the hairs into a mesh and exported the whole thing.
I purchased the tent and the giant (CGtrader and Turbosquid). I especially liked the dumb facial expression of the giant

The running characters are free models as well, which I loaded into Mixamo to get the right poses.
Last but not least thanks again to Kadri, who created the sinkhole and towers file, which I heavily modified to get the cliff.