I think, the button assignment was mixed up: up arrow is doing nothing for me, but I can jump with right arrow. Apart from that very cool, may I ask how you did it?
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Oops, you're right, just fixed it. Anyway, i love your game, the idea of an audio only game is so cool.
The way the effect works is pretty simple, it just does a bunch of raycast to generate a mesh which is coloured so that where it hits platforms it's white, and then just does some shader magic to generate the rings, based off the mesh