I got a promo key by the devs and wanted to leave my thoughts: This game is really well made, has a slick presentation and a cool puzzle concept. Even though I've gotten my best score in my very first playthrough with no clue what to do I still do enjoy it. Even though I am must be missing some sort of tactical advice or guidelines about how to play, as I never beat it again. I like the non-intrusive ads and the gameplay in general. Just a minor suggestions: highlight the selected number and the path it took so if you spread out a 9 all the way it is a bit easier to take it back. Also I agree with some posts before me that a progression system would be really great. Some sort of skins and colors would go a long way here. Overall neat little puzzle game which I really recommend to try out.