4 stars for the puzzle. 3 stars for the in-app purchase. Love this puzzle and developer. Very relaxing. I like the way the challenge gradually builds with each level. Surprisingly the adds aren’t that annoying if your only playing g for a short period of time. I do wish they would just offer a paid app right off the bat and not have to upgrade from the free one. The upgrade option is misleading at the bottom of the game. You select to upgrade and end up looking at a completely different app to purchase. You have to wait until it cycles through adds to get to the actual upgrade. Which I have t been able to do yet.

In spite of no instructions, I liked this little puzzle game. I especially love when my solutions results in a unique shape for my pipe configuration — but I also enjoy the asymmetry of other solutions. I'm also very glad to be able to play this game while listening to MY own tunes — I really hate games that force us to ONLY listen to their music, whether you pay or not, whether you like it or not. I'm also VERY GLAD that this game is NOT timed — I want to take my time & consider my options, NOT race to the finish line!I only awarded 4 Stars as an incentive for some improvements:1) Create new puzzles & bundle them as 99¢ in-app purchase "Puzzle Packs" to continue the game play. I've enjoyed ever-expanding games like this and find it a great way to enjoy more. I'd much rather spend the money as add-ons than as a v.2, v.3, etc & have "new" games to buy — I also prefer it because the whole thing acts as one giant game instead of several little ones. As a bonus, KILL the ADS for anyone who makes a purchase.2) With additional puzzles/levels, add in new/exotic pipe shapes for us to master. I have some crazy ideas like diagonals and "X" & "Y" shaped pieces that can work with star (5 or 6 arms) shapes that go beyond the "+" shapes. There could also be single "S" shaped pieces or "C" or "L" or "U"... Building on that, how about some "H" or "N" or "V" or "Z" shaped pieces (or "<" or ">") that could connect with a "7" shape. And there can be pieces that feature two narrow pipes to spice things up. Be creative & have fun!3) Allow tapping & rotating of pieces on some puzzles. It could be just a few pieces in a puzzle so that we don't know which pieces rotate until we actually select them — or all pieces could rotate.4) Change the game orientation from Portrait to Landscape — it's just a more natural feel for gaming.Hopefully, I'll be able to add that 5th Star soon — and that this game will be spiced up!

The puzzles are challenging enough to keep it interesting, but not so difficult that they become frustrating. I really dig the background music. Very relaxing. I’m really not sure why the complaints about ads. I mean they are 5 second ads, that’s hardly oppressive. Thanks for so many fun games 👏🏼👏🏼👏🏼

Yes ads are annoying but I speak of that too often. At least here the ads are not hugely annoying for me, not yet anyway but time will tell. I’d rather be talking about ingenuity of the puzzles or available options but that is the way the world is today. At this early stage of play I can recommend it.