Where's the GUI part? This seems like a more limited SDL. There is literally zero GUI code in there, unless you count manually drawing individual pixels a GUI.

Where's the GUI part? This seems like a more limited SDL. There is literally zero GUI code in there, unless you count manually drawing individual pixels a GUI. The shape drawing example (NOT part of the library) shows code using the library to draw basic shapes pixel-by-pixel. That is the very thing a GUI library is supposed to do for you.