Update readme

README.md

@@ -2,17 +2,29 @@
 
 Everything in here is a little sample program or otherwise which
 uses [haloo3d](https://github.com/randomouscrap98/haloo3d) and
-[unigi](https://git.lumen.sh/Fierelier/unigi). 
+[unigi](https://git.lumen.sh/Fierelier/unigi). It's all software
+rendered, but you'll need to get sdl1 so it can render to screen.
 
 The libraries required are set as submodules, so you can pull them
-with:
+when cloning with:
+
+```
+git clone --recurse-submodules
+```
+
+Or if you already cloned, you can do this after the fact:
 
 ```
 git submodule update --init
 ```
 
-You don't need to pull in the submodules if you setup your includes
-and stuff. 
+Then, to build any example, just do `make name.exe`. For example, to
+build maze.c, you would do
+
+```
+make maze.exe
+./maze.exe
+```
 
 ## Unigi