First I though: What the heck, a poo game? But I really liked the concept of the game and the tetris way of laying pipes.
It has a lot of bugs though, so I wasn't fully able to complete the level. My biggest problems were that the pieces stopped at the top when using the down arrow and stopped in midair, when trying to move them under preexisting pieces. Also the up arrow for rotation needed some getting used to but this worked eventually.
All in all I think with more polish this idea has a lot of potential.