Question 1

How many colours are there?

Accepted Answer

Three on the first level, up to eight later u2014 always with two spare tubes available.

Question 2

What counts as solved?

Accepted Answer

Every tube holds four balls of one colour, or is completely empty.

Question 3

Can I pour a partial run?

Accepted Answer

Yes u2014 you pour as many as fit, which is how you break up a tall stack.