That was very good! Driving felt really smooth and satisfying by itself already, I didn't realize at first that there was more to do than just driving around but I already enjoyed myself simply driving around so finding the big robot was just a good surprise.
I am slightly conflicted about the color sceme though, while it looks very pretty it also makes it a little difficult to see where to go and I smashed into a couple walls aswell because I couldn't quite see how close they were, but this is a very minor thing because smashing into the walls was kinda fun by itself too :P
Great job!