I didn't want to make runner game because that's overdone. I chose skill based game approach. In this game you don't loose nothing but time :D
It' hard intensionaly and more fun by not playing safe.
What's problems do you have with colors? I have slight color blindness (the one on red color) but still didn't get in my way of playing it since I focus on shapes. I noticed one pallete having too close colors for solids and background.
Since several people mentioned color switch feels too drastic I have an Idea when I'll use this trick next time.