This was a lot more challenging than I thought it would be at first blush. I liked how the levels gradually introduced concepts that built on each other. Sound design is minimal but effective. Pretty impressive for the time frame! 

To be honest, my first impression was "meh, one of these games again", but the way the pipes snap together and rotate as a whole is a (at least for me) completely new approach to this kind of puzzle games and works very, very well. It get's quite hard relative quickly and requires a lot of planning ahead. Lots of fun!

Awesome game!