Thank you so much for playing and glad you enjoyed it! I agree, it definitely feels a little less than fair, I've crowdsourced some ideas to improve that, open to hearing your ideas!
Yeah about the music, that was my last 45 mins of frustration right there! I wanted the music to play through the first 4 levels and the final level does have different music. My music manager code was very stubborn (I think it was too coupled to other objects for DontDestroyOnLoad to do the right thing) and did not want to work for me without bugs so I had to remove that part so I could submit :(