No walking in the mazes! You will break the floor!
It's probably a good idea to choose one maze and stick with it. There are slight differences between the two.
Your robot may "drift" at higher speeds
You cannot dead-reckon for the competition or for functionality! Functionality must use at least one sensor.
My recommendation: keep your algorithm simple! That way, there's less to debug when things go wrong.
The charge level of your battery can impact your sensor readings and motor speed - be wary of this!
Naming your robot something cool is critical! Mine is Sir Mix-a-Bot. A label maker is provided in class.
Good first step: Go from the entrance to the first wall and stop - while avoiding left and right walls.