Arduino bumb switch rumblebot

This is my first Arduino robot that I made some time ago and I'm still adding little things to it to make it more interesting. The main part of this robot is Arduino UNO board. The hole robot works like this: if it hits an obstacle, micro switches in front of the robot get pressed and they pull up the digital pins on the Arduino. The code then does the rest and it's sent to the sn754410ne motor driver IC that controlls the motors.