flixel++ is a port of Adam "Atomic" Saltsman's Flixel library originally created for ActionScript 3.
flixel++ is a work in progess, things might change or break.
Make sure you clone with submodules OR it will not work as the needed submodules are not there.
git clone --recursive https://github.com/coolfren/flixelplusplus
If you already cloned it:
git submodule update --init --recursive
Refer to BUILDING.md for instructions.