Tens of thousands of sports fans flocked to Levi's Stadium Saturday night for the first ever game there, putting virtually every aspect of the new facility and the city of Santa Clara to the test.The San Francisco 49ers said they were pretty happy with the way things went Saturday night, but they said they are still looking for ways to improve.Nearly 50,000 fans attended the event, a great dress rehearsal to prepare for the 69,000 49ers fans that will attend the first game Aug. 17.Most of the people NBC Bay Area talked with said they were able to get through traffic and get to their parking sports easily.The Vice President of Stadium Operations said Saturday night's beta test went well."We're never going to stop looking to try to improve candidly, but...parking and traffic is always going to be a number one priority for us, so we'll look at that," Jim Mercurio said. "We'll look at how we can integrate ourselves with the Santa Clara Police Department, and the folks at VTA, the traffic engineering, all of our staff, and we'll always focus on stuff like that."Some people complained about how long it took to get out of the parking lots and on to to the highways,...