I had a bit of trouble distinguishing red and blue with the armored slimes. Then on the last boss, as I was color-blind, I thought I couldn't distinguish red and blue from the little orbs the boss threw at us. I finally understood that the orbs weren't colored and that you had to look at the little stars that told you the right color and then remember.
It has to be said that your reds and blues, especially on the slimes, are very bright, with a lot of white in them. This makes them difficult to distinguish for me. So when I saw the little white orbs, I thought they were colored but I couldn't see it, so I didn't think to pay attention to the stars ^^'
I don't know if I'm being very clear when I talk about very bright blue and red? Perhaps a color-blind mode could make these two colors more vivid, more fluorescent.
