You said yourself, this is a prototype for controlling a value with audio input. I wouldn't consider this as a game. But good job on the atmospheric levels. Consider building upon it with new stuff. I would recommend checking some articles on how to runtime analyze AudioSpectrum, so that your environment moves with your background movement.
Here is an article if you like to check it out : https://medium.com/giant-scam/algorithmic-beat-mapping-in-unity-real-time-audio-...
I don't like anonymouse voting here is my rating!
Keep up the good work.