I love the concept! And it was a lot of fun to play. It was simple easy to pick up, but always kept me engaged and thinking about how to better prepare for the next round (or color requirement).
The one thing i would like is to give the player the option of which color producer to remove if there are multiple color producers. During one of the rounds i had 3 red producers and once i completed one of the new colors it removed one of the ones i wasn't using to make the new color. I didn't realize it and it cost me my run.
The music was a little annoying and the sprites basic, but not bad. Overall a great game!