I was a bit lost. Maybe it's just because I'm not used to these point-and-click games, but looking for the key at the beginning seemed strangely difficult. I'm not sure if I happened to miss hints or something for it. Eventually I was able to stumble across it and go on to beat the game. I think it wouldn't hurt to bump up the movement speed a bit as well. I don't want to end this review on a negative note tho.
The visuals were very nice, they had a nice style and were somewhat simple yet charming. The dialogue was well written and the fact that the characters were just colors (and were named after those colors) was pretty neat and creative.