Hi Armaan, thanks, and I'm glad to hear that you're interested! I think something along those lines will eventually be able to be created, at least certain aspects like collecting monsters that you can fight with. I could see the party system that I have planned being extended to support it, although it would be a feature to visit further down the road after I get all of the core functionality finished. Long-term I definitely want this to be very open to a variety of gameplay options!
Regarding the Tiny Dungeon voxel assets, it would be cool if I could do that, but unfortunately for now they'll just have to be purchased directly from Oryx. I think he does put the packs on sale once in a while, so that's something to watch out for. On a related note, I recently implemented an Asset Library and will be slowly populating it with some sample assets as I am able (in addition to some from the community as well, I'm about to release a small set of sci-fi ones someone has provided). Keep an eye out for that, also! :)