This game is beautiful! I love the simplistic visuals and the idea of bringing light to a dark place, the red rain effect was also super cool. The fact this only has two, well, now three ratings is a tragedy. I can tell a lot of work went into this and I truly hope you continue this in some way, or expand on it some.
I think it would have done better if it was a webGL build instead of a downloadable game. I think another title could have helped too, R.E.D. doesn't convey enough to make people interested in playing.
I did encounter a few problems, I hit the first red portal a few times, figured I couldn't do anything to it then kept running past and later had to restart because I couldn't light up the next area properly. I also fell out of the 'Don't' room and got stuck.
Overall this is an incredible game and I love what you put together, I just wish more people got to experience it!
Please check out my game if you get a chance!