@donut345 first off thanks for the feedback :). Panel color generation is random, and I'm aware it can lead to just dying, I'm not sure if I want to prevent that, so it was kind of a design decission.
About hitting your own color being more rewarding, I thought about it, but due to the way I implemented collision/going through (using layers) I had to do some additional coding to give points for going through, and I didn't have time. I will probably do it after the evaluation though, since I plan to keep working on the game a bit.
About particles and stuff, I want to add that at some point, as well as sounds, but again I didn't have time to tinker with the particle systems Unity has and I'm not familiar with them ^^"