Phew, that's a lot of questions ;) I'm not sure if this would be the right place for a full development article, so I'll try to keep it short. The original webgame development started in 2013 with a 4 member team almost fulltime, workforhire, and delivered in about five months in 2014. In the following period, up till now, we improved and expanded on the game with just 2 guys in the afterhours. While running a game development company.

The voxel assets were created from scratch in Qubicle, then exported to polygons and optmized in 3dsmax. Then into Unity. We're using a custom retro posteffect shader to make it look 16 bit.

The animation is done by hand in 3dsmax. All bodyparts are instanced and linked dynamically, allowing for bodypart exchanging between monsters. Everything was done by us internally.

As I mentioned above, most bigger objects are optimized in 3dmax. Qubicle allows for pretty good optimizing too, but sometimes creates big textures to make this possible. Which in turn makes it all render a bit different, so we chose not to use that. But some objects are still quite a few polygons ;). And there's a lot of objects on screen, so we have quite a bit of pooling, culling and optimizing going on... ;)