We plan to make something like your typical "Guy goes into dungeon" scenario, the only difference would be that instead of a dungeon, the character is exploring a big maze like forest.
More than a crafting system, we were thinking on something like "He gets this kind of metal that releases heat and a bar of wood, and he can make a new flaming sword", we wanted him to use these new weapons to get access to new places in the forest, kind of like in a Metroidvania (but in top down RPG flavour), so it wouldn't be like "oh no, I've run out of arrows, let's go back to the village and make 100 more), it would be more like a progression system.
And the only tools we have right now are RPG maker (which we don't want to use because we don't want our game to be too generic), Game Maker (which we are actually OK on using because we have been learning a bit about it recently) and Unity (Which for now is completely out of our reach).
I have another friend who is actually a computer ingeneer, but I don't want to bother him hahaha, so we are locked with the two of us for now.