Glitch: my keyboard popped up a few times making it impossible to play (and there was nowhere to type anything, so I'm not sure what that was about). Restarting my phone cleared it without losing my place in the game. Annoying but not impossible. Without that, 5 stars easy. Short quick games (hardest one no more than 5 min.), perfect for a brief break. Goes fast because it's all deductive reasoning, no guessing. I like that. Suggestion: an undo button. Right now if you find yourself having contradicted yourself (uh...not that that EVER happened to me, mind you...), you can either try to muck through (worked a coupla times) or restart (more efficient option for me). But you can't backtrack to determine where you went wrong. Would love that! But again, very brief games, so no big deal to restart. And a timer would be nice. I found myself getting lazy because no one was pressing me. But it was also sometimes nice to not be pressed. Timer option? Might be too much to ask. All in all a 5 star game in a 4 star body. Nice work, folks!

Please fix your ad issue on Apple devices to give you a five star rating. Your ads that have a multiple ad structure where you have to select continue to move to the next ad (which is ridiculous in the first place) do not allow users to continue. So you’re stuck on the first ad without the ability to move to the next and have to restart the game. Fix this please

Some of the ads get stuck halfway through and I have to completely shut down the app and watch another in order to play. This is happening more and more frequently and is frustrating! Please fix. Otherwise I love the game.

I wrote a big review but it was erased because I didn't pick a good nickname. Anyways this app is excellent!I do wish swiping to fill many squares with water would "lock" to a row/column so I don't fill neighboring squares by accident. Sometimes in the middle of a puzzle it's hard to tell what was an accident and I have to restart.