Trainyard was first released in 2010.

Canadian game developer Matt Rix developed trainyard in 2009-2010.

The inventor of Trainyard got the idea for the game while riding a commuter train to work.

Only one player can play a Trainyard puzzle at a time.

Aquamarine is not one of the colors used in Trainyard.

A player uses his or her finger to draw tracks.

Trainyard puzzles often have many possible solutions.

Trainyard has been touted by reviewers for its gradual learning curve.

As trainyard puzzles become more complex, they require more trial-and-error experimentation.

Trainyard puzzles do not have a time limit.

Puzzle solutions uploaded to the Web by other users are called cheats.

The developer of Trainyard, Matt Rix, is from Canada.

Trainyard costs $0.99 to download.

Maze puzzles were invented in ancient Crete.

There is no point system in Trainyard.

There is no instruction manual for Trainyard.

Plants vs. Zombies is a game on sale in the iPhone App store for $1.99

Llamas on a Rampage is not an actual iPhone puzzle game.

Trainyard involves both experiential and collaborative learning.

Trainyard Express has been downloaded more than four million times, according to its promo.