I feel like you should define what you feel is would be a "tacked on" adventure element/mechanic, survival element/mechanic, and base-building element/mechanic; you need to see what would make sense for YOUR game.
Afterwards, you should try to narrow down what you feel would either need to be put into the dumpster (like hunger) or be made more interesting (like hunger dictating how fast you travel on the map, or damage you deal), really this part would (probably) be the hardest because if you just throw all stuff in the trash it may make it very bare bones, but hopefully putting everything out on paper will give you something to jump off of.
I haven't tryed your game yet, but a friend of mine has (that's why I'm here in the first place). I really want to help with it cause it looks very promising (and I have all the time in the world right now, so might as well) and really how could giving feedback hurt?
I'm going to play it after it finishes downloading and give more indepth feedback after a day or two, but my advice for now is to put mechanics/game elements on a list to see everything you have to work with (it really does help)