Seems pretty easy to me - just yank/bounce it straight up and down, and click it as it comes by. Kind of like shooting a target tossed up in the air, the trick is to hit it when it isn't moving (top of arc). The colors seem to be random, but once you get past black it has a lot of pale green and blue and and such. Got tired of clicking before I identified a sequence.
It's extremely well done, really acts like a ball on a string in a g-field. Very tough to catch it if you have any rotating motion, especially with a trackball "thumb mouse" like mine.
They could really make it tough by randomly varying g - what worked to get a click the first time would have to be changed to get one the next time - truly maddening :-laf :-laf :-laf