This is the type of game that requires hints. In all the different modes of the game, there should be hints. However, this is not the case. I find that surprising and frustrating. I understand the idea that using hints perpetually defeats the purpose of a puzzle, but for those that don’t care, their absence is a glaring defect in the design.
I appreciate that this game has no IAPs. This also baffles me, but one can’t complain.
I’ve also noticed a glitch in the audio; I play most games with the regular volume turned all the way down, but the ringer volume turned all the way up. I encountered something with this game that I’ve never seen before: every so often, when I make a move, it is audible at my ringer volume. This is very unsettling.
Overall, this is a good game, and I’m surprised that it has only received 7 ratings. With that bug fixed and the addition of hints in every mode, this specimen has a very high potential, and I will rate it accordingly.