Wait a minute... 8 stones around a circle for a furnace... punching tree and solid rock to break and harvest them... I think you came up with a new and clever million dollar idea! Although I feel like you should have gone for a 3d look :P.
Jokes aside, l ike others mentioned quite ambitious to create so many systems into your first ever game jam submission. Which is risky and sometimes pays off and other times hits you, because you may have lots of bugs or even a game breaking one.
This may not happened this time - but beware with statistics i just made up in my head - I would guess, if you already endangered by scope creep in a jam game, its even likelier to happen in a full indie project.
But nevertheless... it worked, I had fun and liked it overall... So keep improving and also think about cutting features in favor of polishing existing ones. And only if features are working and polish - think about adding something.
Great job completing and submitting the project 30 seconds before deadline - imagine internet dying here x_x