I like this game because it is challenging and I love logic puzzles. However, there are several things about this game that I do NOT like and/or believe needs to be fixed (ergo, I only gave it 3 stars). The first thing is the amount of ads. I get that you need to have ads for your sponsors, but that MANY ads that FREQUENTLY (i.e., as soon as I open a puzzle, every other time I guess either right or wrong, etc.) is a bit much. The second, and essentially the BIGGEST, issue is how the actual game is formatted. What I mean by that is that there are some puzzles that fit just fine on my phone screen, but for much larger puzzles, I often times have to scroll back and forth, which wouldn't be so bad if I could turn my phone landscape and play the game that way. Also, I tried playing this game on my iPad (since the app CLAIMED that it is iPad compatible), but it was only formatted to an iPhone screen (also, I still couldn't turn my iPad landscape for easier gameplay). If it weren't for those two issues, along with the fact that there's no way to get more hints except to PAY for them, I would give this game 5 stars. If these problems are fixed, then I will go back into the App Store and change my review.