neropatti - thank you so much for the time invested into leaving this useful feedback.
I believe Aiceplays has indeed made the music, all credits to them for that.
I have learned a new term from your feedback, Z-fighting. Now i know what it means. This was my first 2D game and only post submission did I find out about the built in Unity 2D Layering system, Sorting and Order in Layer. Oh well, you live - you learn.
But yeah, going forward I'm sure to keep in mind your feedback and try and avoid these issues in the future projects :D
Cheers!