Not knowing which Nextbook model you have I'm going to offer a few general opinions:
1. Nextbooks are great-looking and very practical devices with reasonable price tags, as evidenced by their current model range:
http

/nextbookusa.com/
2. They are, also, fundamentally oversized smartphones - especially in terms of specs. This means you're likely to be able to play the same types of games as you would on a mainstream smartphone - from Microsoft Store and Google Play. Some 2D hidden-object games should be able to run a Nextbook, but don't try any kind of 3D games.
3. Similar reservations apply to watching movies: The movie clip will play but it's going to be at 768p. This means that the same movie clip will appear sharper on a...