Arduino Obstacle avoiding robot

This is my first robot attempt using Arduino uno it is almost finished and I have a code but there might be something wrong with the wiring if anyone has any suggestion or tutorial on how to wire it properly be sure to leave a comment. It took me quite some time to create as I am still a teenager and I just know little of programming. I used newping and servo libraries for the programming to be easier and I think I have created a satisfying code. The overall cost comes around 100€ and that is with all the discounts I had due to knowing the seller. Please any suggestions of similar projects problems are welcome. Myself I always loved robotics and I have learnt the basics of code, I hope one day to pursue my dreams and become an engineer (-;