First, Giga will ask you "Speed?" Whatever number you put in will determine how long Giga will wait between each action. It is recommended that you use a speed of 1-3. At speed one, it usually takes around a minute, sometimes up to two minutes, but once I have seen it solve it in less than 20 seconds. Then Giga will ask you for a password. The password is your username, or if you are not signed in, "admin." Press space before it begins to change the maze.
Please remix with different mazes! (Use the same style that I did.) NOTE: This will only work for mazes with 1 path. Version 1: http://scratch.mit.edu/projects/21264364/ This one is much slower.