Don't worry yourself with getting donations running "soon". It can be a bit of a hassle because of legal issues. I have only done it myself recently when I've had lots of free time on my hands. Though itchio itself wasn't a big hurdle, only the bureaucracy that comes with making money from something.
I also just checked back on the music as that glitched out on my playthrough. It is really good, I like such atmospheric spacey synth tracks. From the very little I know they can be hard to make due to how much possibilities there are with synths. To use that for an atmospheric track needs atleast a basic understanding of sound engineering/sound designing or whatever it is called.
But I shouldn't really try to analyze beyond my own knowledge. What I can say for certain is that you managed to pull off a really good atmosphere with the music on this game.