Wow, I love this game! What a great idea - it's a really fun and engaging way to play through their story. You're making choices, but you also have a sense of discovery since you don't know what effect the colors will have on the story.
I loved the story of the characters' relationship and found it really touching, and I also enjoyed the silly endings a lot! Probably my favorite was when the girlfriend was a mermaid - or maybe the magical girl one, except that ended badly. :)