My fingers are trained to type "make", so dead-simple Makefile

I think this Makefile is simple enough to stay in the spirit of not needing
any fancy build capabilities. It is not a windows "batch" file, but it is
not far from it.
ahh... rename build dir

I named the build directory "gebouwd" so tab-completion would work for
my build script. Now that I type "make", this is no longer useful.
shift the colors based on keyboard input
keyboard only of Day 6 "Gamepad and Keyboard Input"

maybe I will buy a gamepad one day.