No walking in the mazes! You will break the floor!
If your chip is in the breadboard, you'll have to wire it to the appropriate pins on the Launchpad to light the LEDs.
If you want to use P1.1 or P1.2, you should remove the TXD and RXD jumpers.
Be mindful of your interface when writing code! You'll want to hide all of this complexity in a library once you get to the maze.
unsigned int getLeftSensorReading()seems like a good prototype
char isLeftSensorCloseToWall()might be useful