update: more variety

Windows and Linux versions now create more dynamic and varied images.

Before, the squiggles drew the Perlin noise space multiplied by a random constant. Now, that constant has been replaced with--what else--a Perlin noise space.

Before, the squiggles began anywhere on the canvas in an even distribution. Now, the squiggles spawn around a random point on the canvas in a Gaussian distribution scaled by a random constant.

This update is delayed for Android. Debugging Android is hard.