Feels like a demo (albeit a good one)
The underlying gameplay is interesting and (to my knowledge) novel, and well worth checking out. I have only two complaints. First, it's too short. Most of the ten included levels are extremely straightforward tutorial levels, designed to quickly introduce the player to the way the game works. Once you get the hang of it, though...the game ends. Second: the controls are a bit unforgiving. If you accidentally tap the wrong square, or tap one fewer square than you meant to, you've pretty much lost the level and need to redo the whole thing. An "undo last move" button would've been much appreciated.
Hope there's more to come!