The mechanics are supposed to be that you can construct various things from others. For example you can make Water from two Hydrogens and one Oxygen, you can make Soil from two Oxygens, one Silicon, and one Aluminium.
The method of crafting (where you press a number to do a predefined recipe) is definitely not what I had intended for the game, but I didn't have enough time to do something better. I can't do this for the LD37 version of the game, but what I want to do is have a list of recipes that are 'known' from the items you've seen already, but the output would be unknown. So you would know you can make something but not what it'll make, and then once you've made it, you would now have "seen" that item too, and be able to make more stuff.
I have plans for interactions with items, for example, like eating Food, drinking Water (maybe...), using a Computer, etc. I also have a bunch of plans for how multiplayer would work in this game, but again this will all take time to implement.