React Game Kit is an open source library providing a number of functions that simplify game creation with React Native.
With React Game Kit you can easily manage the game loop, draw sprites, create animations, and add physics. There is also support for tilemaps defined with a simple array syntax.
You can find React Game Kit on Github here.
You can find a demo with further explanation on the Surge site.
A nice library for those looking to create games with React Native.