Thanks for all the feedback and advice! I do appreciate everything everyone has to say about the game, and plan on incorporating ideas in a future update. I've given the color mixing a lot of thought, and I agree it can be unintuitive the first time you encounter it, but I think the additive color model is core to the gameplay. Perhaps my nerdy love of science is misleading me from what the average player would enjoy, but I'm trying to simulate the way light really does mix - because, well, it's a game about light. Perhaps I could add the option to play with a more traditional color mixing scheme?