9fans,

i wrote a clone of the '2048' game in plan 9 c.
http://9.offblast.org/stuff/2048.c

8c -FTVw 2048.c; 8l -o 2048 2048.8

it can also be run in plan9port (amd64 linux here):

9c 2048.c; 9l -o 2048 2048.o

some of the credit goes to aap, whose version is here.
http://plan9.papnet.eu/misc/2049.c