Thanks for playing!
We were going for that kind of level design, glad it paid off and works well. There were plans to add colored spikes so it made a bit more sense, but there wasn't enough time to shove them into the game so it was scrapped:
For color swapping, there's one fatal flaw, and that's with being blue. Since it has nothing that really stands out for it, it was a bit harder to think of anything to use it for other than being used as little gates to slow down whoever the player. Other than that, I like the mechanic too, and it's definitely my favorite part of the game as it has a lot of potential to be used and improved in many ways that I can't think of right now.