I need to admit the second step in the tutorial took me a while. It's not obvious the mixing tiles accept incoming colors only at some of the sides. I.e. you need to go further with the blue and make a U turn.
I had the same experience. Once I figured it out though, it made for a really fun mechanic. Better I think than what I expected (that I could "enter" the tile from any direction).
I really appreciate this suggestion. I also had a friend hung up on the directional concept. I'll look to fix that with a gentler tutorial possible. Thanks for trying it out!
I need to admit the second step in the tutorial took me a while. It's not obvious the mixing tiles accept incoming colors only at some of the sides. I.e. you need to go further with the blue and make a U turn.