Wow!! This is incredible, I think you have some serious potential for a full game here. It reminds me a bit of those old Doodle God games, or more recently something like infinite craft. Everything coming from the central mechanic of the mimic to combine and break apart items is really interesting, and I could see it leading to a lot of really interesting gameplay decisions for a roguelike. Do you craft the wooden sword right away, or wait to see if you can make a more powerful one? Aside from the strength of the concept, the execution is also great, I love the minimalist black and white look, and the music is great. Makes me think of Ultima or something. Great work, this is super interesting and I'd definitely love to check out a more developed version!