First version of raylib is quite complete and functional but there is still a lot of things I would like to improve.
Here it is a list of features I would like to add and functions to improve.
Around the source code there are some TODO points with pending revisions/bugs and here it is a list of features I would like to add.
raylib v1.x
Review Billboard Drawing functions
Review Heightmap Loading and Drawing functions - Load Heightmap directly as a Model