Given the very specific nature of the puzzles, and the greater degree of difficulty than you’d normally see in this broad genre, there isn’t too much more to say about the game. It is purely a matter of whether you’re ready and willing to embrace its challenge or you’re not. I can’t say that in terms of implementation that I can fault it, if nothing else its general construction is quite simple so there’s not much to get wrong. If you’ve been looking for a very different kind of puzzler that will really challenge you to bring your A game this should do the trick, but if you’re not down to drive yourself a bit crazy with it you’ll want to stick to simpler fare.