Pipes

Rotate the pipe segments to connect all the pieces. Easy to learn and very addictive.
Gameplay video: http://tinyurl.com/pipes11 (goes to Youtube.com)
Features:
- Randomly generated puzzles - never the same game twice
- Multiple board sizes ranging from "Training Wheels" (4x4) to "Mega Insane" (56x70)
- Wraparound option (also known as "without walls" or "endless")
- "One color" option - when enabled, all pipes are blue, making it harder to tell which ones are connected
- Piece locking feature to help with large boards
- Zoom and scroll using familiar iPhone/iPod Touch gestures
- Auto save and resume - never lose your place, even if someone calls in the middle of your game
- Timer (can be disabled if you want a more relaxing game)
- Online leaderboard - compare your best times to other players around the world
- Offline "personal best times" - try to beat your best times
- Introductory tutorial
- Every puzzle can be solved