Last Sunday I went there, a lot of people. The show at night (9:00 p.m.) is quite good. Most of games have to line up for an hour. You better play the games after six as most of the tours will leave by that time.
we went there early morning on Thursday, so crowded, almost 98% were tourists from China, most games need to line up for an hour or more. very hot, remember to bring umbrellas and water. if kids are going to play the 'wet' games, remember to bring a spare set of clothes.