Thanks! I added the life system to keep it interesting white having a limited set of colors. The reason why I didn't go with random colors was mostly to keep control on the quality of the levels. For example, there's no mixing of white and black even though it made interesting colors, simply because it seemed harder to reason about when I was testing it. Just like there aren't many combination of yellow-blue and yellow-black (two kinds of greens) because it would get annoying for the wrong reasons.