https://github.com/lainproliant/lost-levels

Run submodules.sh to pull down the submodules, then make to build. Requires sdl2 and sdl2-image.

There's two demos: quadtree that shows the breakdown of a quadtree that would be used for collision detection, and simple that I use as a benchmarking tool to see how many sprites I can get on the screen before framerate starts to suffer.