I couldn't care less whether or not he thanked the makers of Flow for the idea - this is basically the exact same game. The only probable thing that's missing is the glow effect! Ripoff indeed.
This is by far the best point-and-click game I have ever come across. It's kind of reminiscent of the Myst series, and it's certainly captivating. The graphics are very good, but the most impressive thing is the fact that they have made the tasks involved, yet not overly-complicated (you don't get frustrated, and if you do there is a real-time help system as well). The thing that I found really nice, compared to ALL other point-and-click games, is that items such as the wrench and screwdriver had to be used numerous amounts of times - a welcomed change to having tons of one-use items.
Overall, this is a fantastic game that you need to play. 5/5. Awesome.