As for local fatigue, I think normal, this happens not so often, it's good, because making games being tired is not quite productive.
Honestly, I would throw off the post on how to finish the game, but I found it only in Russian (I read it in Russian in more exact), in general it is from the creator of Spelunky if you can read it interestingly, this post opened my eyes. 0.o
About the music thanks :)
I wanted to find a good one
As for creating my own music, I think it's cool, I used to do my music before, when I did games on another program, it was fun
The truth is now, I use BFXR, purely to make sounds. And the main supply of music is taken from YouTube :)
By the way, what do you think about continuing the correspondence in a discord, just here a lot of text was formed :P