Hey ! First of all fantastic work. Some sounds are really midi-ish, but to be fair it fit quite well minecraft ambiance.
I do have some reserve on the use of the panning, it's really cool that you made the piece dynamics and alive, but it lost me sometimes : felt like the jump from left to right is sometimes to harsh and came from nowhere.
The melody and harmonies are spot on, really cool. They could be reinforced by a more "evocative" composition, maybe with a "flowing" arpegio in the back, or with ambiant sounds reverbering in the musics ?