An interesting concept, but it needs some improvement in my opinion
The gameplay is too basic; you should add an extra mechanic so I don't waste too much time doing nothing.
There are a few bugs when we restart (music overlapping, color not showing, timer)
The good points are the design (really neat); the loop is there, and we don't see any weird overlap for a procedural generation.
And I didn't understand what the little red box is, is it a bonus? If yes, how do I get it?