diff --git a/README.md b/README.md
index 78a00ae..e6c0313 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # go-game (package "goga")
 
-Game engine written in Go using OpenGL and GLFW.
+Game engine written in Go using OpenGL and GLFW. Mostly for 2D rendering, but also capable of rendering 3D, providing everything to get you started.
 **Under heavy development, do not use yet!**
 
 ## Install
@@ -19,3 +19,5 @@ go get github.com/DeKugelschieber/go-game
     - 4.5-core
 * https://github.com/go-gl/glfw
     - 3.1
+
+To use an older GL version, you need to replace the GL imports in package goga. It should mostly be compatible down to 3.x.