The makers of Pixels were faced with what I imagine was pretty difficult task of making a film that appealed to both young audiences as well as the folks who grew up with the games and references featured in the film. Taking that into consideration, I did enjoy the movie. To be honest, it wasn't as "nerdy" as I had expected and hoped but it was entertaining.
The special effects were outstanding for the most part. There were only a couple of instances where the green screen effect was sloppy. You'll catch them no doubt.
It was a Happy Madison production so the cast was a lot of familiar faces. And the song choice was predictable. But didn't really hinder the film at all.
As for story, it wasn't awful. There were a few times when I just couldn't go along with it. But for the most part it didn't feel forced. It was all very funny and typical Adam Sandler humor.
There's nothing after the credits but during the credits you can watch the entire film in 8-bit format. Pretty cool.