Absolutely mind-blowing contribution to puzzle jam! You deserve a thousand million accolades! That said, you need to improve your onboarding so that users comprehend the "none of the same colour beside itself" rule from the start.
Also, I'm not sure if I won or not? I solved the one with four colours. Is that the last level? Is Potomax correct below that I would have heard a congratulations if my sound had been on? I would like many more hours of this game.