add COPYING file, which is CC0 1.0 text
tree3118da6c7bdd5764f920ca6da8ffe799bf1813a7
-rw-r--r-- 7048 COPYING
-rwxr-xr-x 99 Makefile
-rw-r--r-- 1759 README.md
-rwxr-xr-x 3083 log.txt
-rwxr-xr-x 6050 runner_game.ino