Love this one! I don't know anything about the device you made this, but I have the following comment:
How much music theory and harmony stuff do you know? I had the feeling that "A peaceful farming village" and "Deaths theme" could sound a lot more interesting with a more intentional chord progression and some sort of other harmonic movement than either always staying on the 1 chord or the chromatic descending thing going on in peaceful farming village.
I'm not that well versed and I don't have the best ear yet so I might be completely misinterpreting it, just my initial thoughts on listening.
Some of these songs could be a little longer too I think.
Credits is my favorite!