Pipe Puzzle

The game board consists of sliding blocks, each showing part of a pipe. There's a gap in the blocks, and blocks adjacent to the gap will slide into it when tapped. The object is to slide the blocks until the pipe is properly connected from start to finish.

The game can generate an infinite number of puzzles [*] at each of 5 difficulty levels.

There is a small banner ad, but no other annoyances.

[*] Okay, a million puzzles at each difficulty level. After that they will repeat!