I always liked tunnel effects and I wanted to see if I could make one in PICO-8 with a simple method of drawing circles. I think it turned out pretty well. There is the issue of gaps between circles, but this does allow you to see parts of the tunnel further in the distance which I find interesting. I also gained a bit of intuition about shaping behavior with sincos and square root functions.
I also decided to try out the music capabilities of PICO-8 for the first time. I was mostly inspired by a track from the game No Time to Explain. I don't remember which one, I have just had parts of the melody floating around in my head for years.

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