Needs more instructions

The game is fun, but there is no direction for the bottom, stored colors. How do I choose only one box when I have more than one box filled? How do I rotate the multiple stored boxes I want to use.

Also, half of the game is simply luck as you will get a request for a bunch of one color and only have a few, spreadout blocks of that color to use.

thrill000 about twofold inc.