Very sweet game, I only wish it had some sad piano music in the background, it doesn't feel complete without.
5/5 anyways, I don't think it should have been longer like many people have said, I think the shortness and simplicity make it very attractive.
I finished this game a while back, but I had an urge to come back and make a review, so I will.
I want to say I think this is an incredible game, on so many levels. Not only did you build on the premises of what made the original hexiom such a classic, but you maintained the feel of quality, something I not often feel from games these days.
The colorblind feature came as a shock to me, in a good way though, because I do not know many developers who would go out of their way to do something as thoughtful as that.
Lastly, the levels themselves were beautifully done, and the difficulty ramp was extremely smooth. Congratulations on making this masterpiece, you are very talented. Kudos.