At the moment, the three floor tiles, the two beige ones, and the grey one are "borrowed", and
due to be replaced (there might be a couple of other "placeholder" graphics like the pillars as well). The rest of the graphics I did myself in GIMP.
The premise, is you go in exploring an abandoned mine, near where your family/tribe is founding a new settlement after an long sea voyage, escaping some unknown repression.
The mine entrance collapses behind you when you enter, and so you have to explore and survive, and maybe make it out with some treasure.
Depending on how you do, when you escape you will be presented with a generated story about what happened to you afterwards. From beggar to becoming the chieftan, dead from consumption, or living a long life with many offspring, it will depend on how you play.
The main thing is to create a fun top down rogue game, with the emphasis on strategy, rather than hack and slash. For example everyturn you get a number of movement points, rather than being a move-a-tile-turn, or single action.
I suppose you could say the game is a cross between Rogue and LaserSquad in gameplay.